Sunday
May 19, 2013

Search: A block of mass m1 = 4.40 kg on a frictionless inclined plane of angle 30.0&deg; is connected by a cord over a massless, frictionless pulley to a second block of mass m2 = 2.50 kg hanging vertically (Fig. 5-41).

Number of results: 49,260

College Physics (repost)
A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block? Specifically, if you ...
Monday, October 12, 2009 at 10:33pm by Jenna

physics!!
The two masses (m1 = 4.96 kg and m2 = 2.90 kg) in the Atwood's machine shown in the figure below are released from rest, with m1 at a height of 0.800 m above the floor. When m1 hits the ground its speed is 0.203 m/s. Assuming that the pulley is a uniform disk with a radius...
Sunday, October 21, 2012 at 7:24pm by Emily

college physics
Two blocks of mass m1 = 3.00 kg and m2 = 7.50 kg are connected by a mass less string that passes over a frictionless pulley. The inclines are frictionless. So this is like a triangle with a pulley at the top and both blocks resting at either side of the pulley each at a 35 ...
Wednesday, May 23, 2012 at 4:17pm by kathy

Physics
A 34-g bullet traveling at 120m/s embeds itself in a wooden block on a smooth surface. The block then slides toward a spring and collides with it. The block compresses the spring (k=100 N/m) a maximum of 1.25 cm. Calculate the mass of the block of wood.
Thursday, January 5, 2012 at 9:39am by Brian

Physics
A 34-g bullet traveling at 120m/s embeds itself in a wooden block on a smooth surface. The block then slides toward a spring and collides with it. The block compresses the spring (k=100 N/m) a maximum of 1.25 cm. Calculate the mass of the block of wood.
Thursday, January 5, 2012 at 9:39am by Zach

physics
A certain force gives an object of mass m1 an acceleration of 13.0 m/s2 and an object of mass m2 an acceleration of 2.10 m/s2. What acceleration would the force give to an object of mass (a)m2 – m1 and (b)m2 + m1?
Saturday, October 9, 2010 at 10:31am by koraile

Physics
m1=m2=m3 =m, Total mass = 3 m. Acceleration of each block a= F/3•m. T is the tension in the string between blocks B and C. T is the pulling force on both masses B and A with an acceleration of a. T = 2ma = 2•m• F/(3m) = 2/3•F = (2/3) •28 =18.7 N
Tuesday, May 29, 2012 at 10:40pm by Elena

Physics - Static Forces
Blocks 1 & 2 are connected by a string. Block 1 is on an incline & has a mass of 5.4kg. Block 2 is hanging from the string & has a mass of 2.1kg. The coefficient of friction is 0.22 between all surfaces. 1: What is the minimum angle "theta" can be while ...
Sunday, March 18, 2012 at 11:48pm by Josh

Physics
When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.370 m/s2. Block 1 has mass M, block 2 has 5M, and block 3 has 5M. What is the coefficient of kinetic friction between block 2 and the table? block 1 is haging off the table ...
Thursday, November 18, 2010 at 9:27pm by Will

Math/Physics2
The block has mass m=8.5 kg and lies on a fixed smooth frictionless plane tilted at an angle theta=20.0 degrees to the horizontal. Determine the acceleration of the block as it slides down the plane. If the block starts from rest 15.0 m up the plane from its base, what will be...
Wednesday, September 23, 2009 at 3:38pm by Era

PHYSICS
you don't need the q Let M1 = moon mass; M2 = Earth mass, r = distance from spaceraft to moon, and D = Earth-moon distance When the two gravity pulls are equal, M1/r^2 = M2/(D-r)^2 [(D-r)/r]^2 = M2/M1 = 1/(0.012) (D-r)/r = 9.13 = R/r -1 D/r = 10.13 Look up D and compute r.
Wednesday, January 9, 2008 at 2:37pm by drwls

Physics 121
m1 =4 kg, m2 = 2 kg, m = 0.5 kg, R = 0.25 m, h= 0.75 m. Projections of the equation according to the 2 Newton's law for two blocks on the horizontal (for the 1st block)and on the vertical (fot the 2nd block) axis: m1•a = T1 m2•a =m2•g-T2, The equation of the...
Saturday, May 5, 2012 at 9:07pm by Elena

physics
Two blocks with masses m1 = 1.10 kg and m2 = 3.10 kg are connected by a massless string, as shown in the Figure (the figure shows m1 on top of a box and m2 hanging off the side of the box). They are released from rest. The coefficent of kinetic friction between the upper block...
Tuesday, February 28, 2012 at 3:55pm by meyer

physics
Two blocks with masses m1 = 1.10 kg and m2 = 3.10 kg are connected by a massless string, as shown in the Figure (the figure shows m1 on top of a box and m2 hanging off the side of the box). They are released from rest. The coefficent of kinetic friction between the upper block...
Tuesday, February 28, 2012 at 3:53pm by meyer

Physic
A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block ...
Wednesday, September 28, 2011 at 9:25pm by Don

Physics
total mass= M1+M2 force pulling= M1*g Forcepulling= totalmass*acceleration
Thursday, May 24, 2012 at 11:57am by bobpursley

Math
C(3,-1), P(15,4). m1 = (4+1) / (15-3) = 5/12. m2 = -12/5 = Negative reciprocal 0f m1. P(15,4). Y = mx + b = 4. (-12/5)15 + b = 4 -36 + b = 4 b = 40. Eq: Y = (-12/5)x + 40.
Sunday, August 26, 2012 at 2:44pm by Henry

physics
A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.16 kg) and embeds itself in block 2 (mass 1.85 kg). The blocks end up with speeds v1 = 0.560 m/s and v2 = 1.36 m/s (Figure (2)). Neglecting the ...
Wednesday, May 9, 2012 at 3:46pm by Kasie

Physics
A 0.400 kg block of wood hangs from the ceiling by a string, and a 0.0700 kg wad of putty is thrown straight upward, striking the bottom of the block with a speed of 6.40 m/s. The wad of putty sticks to the block. How high does the putty-block system rise above the original ...
Thursday, April 29, 2010 at 7:22pm by Physics

physics
a small block of mass M=0.050 kg is released from rest at the top (h=0.60 m) of the curved frictionless ramp shown above. The block slides down the ramp and collides with a larger block of mass 1.5M=0.075 kg at rest at the bottom of the incline. The larger block moves to the ...
Sunday, November 13, 2011 at 8:52pm by emilyy

physics
Consider a ball of mass m1 moving with a velocity u1 collides elastically with a ball of mass m2 at rest.Show that the maximum energy transfer takes place when m1=m2.
Friday, September 2, 2011 at 9:34am by Nantu

physics
hello! I have been having a lot of trouble with one physics problem that I have for homework: any help would be greatly appreciated! 'A block of mass 12 kg starts from rest and slides a distance of 8 m down an inclined plane making an angle of 40 with the horizontal. The ...
Sunday, November 25, 2007 at 3:37pm by Ty

AP Physics Word Problems ASAP!
A block of mass, m, starts from rest and slide without friction down an incline. a) What is the acceleration of the block while itis in contact with the incline? b). If the block leaves with a speed of 5 m/s what is the length of the incline? If the block lands on floor 3m ...
Wednesday, September 5, 2007 at 7:48pm by Shari

Physics
An object of mass m1= 203 g is on an inclined surface, that is increasing. The angle of the inclined surface is &#952; = 40o with the horizontal. The object m1 is connected to a second object of mass m2 = 598 g on the adjacent horizontal surface via a pulley at the base of...
Tuesday, October 6, 2009 at 12:09pm by Sarah

college physics
a bullet of mass 8g is fired into a block of mass 260g that is initially at rest at the edge of a table of height 1m the bullet remains in the block and after the impact the block land d=2.20m for the bottom of the table. determine the speed of the bullet
Sunday, December 9, 2012 at 1:35pm by Anonymous

college Physics
A disk with a mass of 1300 g and radius 0.7 m has a block of mass 170 g hanging from it, as shown. The wheel and block start at rest. The moment that the block is released, what is the magnitude of the angular acceleration of the disk? (Note: the moment of inertia of a disk ...
Tuesday, October 26, 2010 at 6:26pm by Sam

Physics-Linear momentum
A block of mass m = 2.60 kg slides down a 30.0° incline which is 3.60 m high. At the bottom, it strikes a block of mass M = 6.80 kg which is at rest on a horizontal surface, Fig. 7-46. (Assume a smooth transition at the bottom of the incline, an elastic collision, and ...
Sunday, November 21, 2010 at 11:06pm by Joe

physics
On an incline plane (raised to 30 degrees) is a block A which has a mass of 10 kg. It is attached to a string which goes through a frictionless massless pulley. attached to the other end of the string is an other Block B. The coefficient of kinetic friction between the mass ...
Tuesday, November 28, 2006 at 4:11pm by Brian

Find the resultant force on (a) the mass m1 = 0.183 kg and (b) the mass m2 = 0.106 kg (the masses are isolated from the earth).. The first mass is 400kg and its 10 cm from the second mass which is 0.183 kg (m1). the second mass is 10 cm away from the third mass which is 0.106 ...
Thursday, September 29, 2011 at 10:45pm by kellie

Physics
The total mass is (m1+m2). We assume no friction between the horizontal surface, nor the pulley. The force causing acceleration is due to gravity on the mass m2 only, thus the force is F=m2g. Using Newton's second law, F=ma, we obtain m2g = (m1+m2)0.098 Now solve for m1: ...
Wednesday, August 26, 2009 at 1:48am by MathMate

Physics
Work backwards, because you cannot solve it forwards since there are two unknowns. (a) Start with the energy transferred to the compressed spring. The block transfers energy to the spring, that's why it compresses. Ek = Ee mv^2 = kx^2 (halves cancel) v = sqrt[(kx^2)/m] v...
Tuesday, October 16, 2012 at 4:16pm by Richmond

physics
An object with mass m1 = 5.00 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2 = 9.0 kg, as shown in Figure P4.30. Find the acceleration of each object and the tension in ...
Monday, June 9, 2008 at 2:11pm by Elisa

Physics
Two objects are connected by a string with a mass less, friction less pulley. The coefficient of friction is .298. The block on the table is 4 kg. What must the mass of the hanging block be so that the block on the table will move with a constant speed?
Monday, November 19, 2012 at 7:39pm by Elle

Univ-Phys
M1 is the heavier car and the mass of the other car is M2 = M1/2 Orginally, (1/2) M1 V1^2 = (1/2)*(1/2)(M1/2)V2^2 which implies that V1^2 = (1/4)V2^2 V1 = V2/2 Also, (1/2)M1*(V1+5)^2 = (1/2)(M1/2)(V2+5)^2 = (1/2)(M1/2)(2V1 + 5)^2 (V1+5)^2 = (1/2)(2V1+5)^2 V1^2 + 10 V1 + 25 = ...
Wednesday, October 7, 2009 at 10:00am by drwls

physics
Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the &#64257;gure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg F a) What is the net ...
Friday, October 19, 2012 at 12:19am by Anonymous

Physics
A block of mass m is projected at speed Vo up a rough plane inclined at an angle theta to the horizontal. Model the block as a particle and assume that the frictional force acting is given by kv^2, where v is the block's speed and k is a constant. What is the block's ...
Sunday, May 13, 2012 at 10:52pm by Anonymous

p3
A block of wood of mass 0.86 kg is initially at rest. A bullet of mass 0.048 kg traveling at 102.3 m/s strikes the block and becomes embedded in it. With what speed do the block of wood and the bullet move just after the collision?
Wednesday, March 14, 2012 at 7:05pm by opp

Physics
A block of wood of mass 0.91 kg is initially at rest. A bullet of mass 0.047 kg traveling at 104.7 m/s strikes the block and becomes embedded in it. With what speed do the block of wood and the bullet move just after the collision?
Wednesday, March 31, 2010 at 2:31am by Max

Physics
A 5.7- kg concrete block rests on a level table. A 4.0- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?
Tuesday, February 21, 2012 at 5:16pm by Steve

Physics
A 5.7- kg concrete block rests on a level table. A 4.0- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?
Tuesday, February 21, 2012 at 5:09pm by Steve

Physics
A 5.7- kg concrete block rests on a level table. A 4.0- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?
Tuesday, February 21, 2012 at 5:05pm by Eva

Physics
Consider the diagram of the box and bucket. If the coefficient of static friction is 0.5 and the coefficient of kinetic friction is 0.3, find the maximum mass of the bucket in order for the system to be in static equilibrium. If the block was given a slight nudge to get it ...
Saturday, January 1, 2011 at 6:47pm by Caitlin

physics (the algebra bit)
m1 a = m2 g - m2 a - m1 g sin theta - (Mu kinetic)m1 g cos theta add m2a to both sides: a(m1+m2)=g(m2-m1*sinTheta) divide both sides by m1+m2 a= g(m2-m1sinTheta)/(m1+m2)
Thursday, July 30, 2009 at 4:21pm by bobpursley

physics
m1•v =(m1+m2)u, u=m1•v/(m1+m2). (m1+m2)u&#178;/2=kx&#178;/2, x=u•sqrt[(m1+m2)/k}= = m1•v•sqrt[(m1+m2)/k}/(m1+m2)= =m1•v/sqrt[k•(m1+m2)]= =0.005•1000/sqrt[20(2+0.005)]=3.53 m.
Wednesday, July 18, 2012 at 2:36am by Elena

Physics
Consider the system of blocks in the figure below, with m2 = 5.0 kg and è = 33°. If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest?
Friday, October 19, 2012 at 8:38pm by Lily

physics
two particles of mass m1 and m2 are joined by a massless spring of spring constant k and natural length L.Initially m2 is on table and m1 is above m2 at a vertical height h.At t=0 m1 moves with velocity v0.find the position of the masses
Saturday, December 4, 2010 at 8:55pm by Anonymous

Physics
A 6.40 kg block rests on a 12.5 kg block as shown in the diagram. The interface between the lower mass and the table is frictionless, but there is friction (static friction &#956;S and kinetic friction &#956;K) between the two blocks. A horizontal force F r acts on the...
Sunday, February 24, 2013 at 12:12pm by Meder

Physics
Two blocks of masses m1 = 2.00 kg and m2 = 3.70 kg are each released from rest at a height of h = 5.60 m on a frictionless track, as shown in the figure below, and undergo an elastic head-on collision. (Let the positive direction point to the right. Indicate the direction with...
Monday, October 29, 2012 at 3:35pm by Jessica

Physics
Two blocks of masses m1 = 2.00 kg and m2 = 3.70 kg are each released from rest at a height of h = 5.60 m on a frictionless track, as shown in the figure below, and undergo an elastic head-on collision. (Let the positive direction point to the right. Indicate the direction with...
Monday, October 29, 2012 at 3:32pm by Jessica

AP Physics B
can you check my reasoning 1. The problem statement, all variables and given/known data ok well then... we did a lab were you have a hanging mass attached to a stirng that went through a straw and was attached to a rubber stopper. The lab was to find the mass of the rubber ...
Sunday, September 13, 2009 at 8:42pm by AP Physics B

Physics for Life science
Assume there is no friction and use conservation of total momentum. M1 = skateboard mass M2 = your mass M3 = ball's mass Vr = recoil velocity Vb = ball velocity (M1 + M2) Vr + M3 Vb = 0 Vr = -[M3/(M1 + M2)]*Vb Plug in your numbers. Vr is negative because the recoil is in ...
Tuesday, June 1, 2010 at 6:06am by drwls

Physics
Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.107 kg, initially moves to the right at a speed of 4.70 m/s, while the second block, of mass 0.214 kg, is initially to the left of the first block and moving to the right at 6.80 m/s. ...
Thursday, October 18, 2012 at 12:08am by koko

physics
A block is dropped onto a spring with k = 27 N/m. The block has a speed of 3.2 m/s just before it strikes the spring. If the spring compresses an amount 0.13 m before bringing the block to rest, what is the mass of the block?
Sunday, October 2, 2011 at 8:11pm by james

Physics
A rocket with a mass M moves along an x axis at the constant speed vi=40 m/s. A small explosion separates the rocket into a rear section (of mass m1) and a front section; both sections move along the x axis. The relative speed between the rear and front sections is 20 m/s. ...
Thursday, April 10, 2008 at 10:28pm by Kristin

Physics
When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4Hz. Find the ratio m2/m1 of the masses.
Sunday, November 13, 2011 at 9:39pm by Leanne

Physics
When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4Hz. Find the ratio m2/m1 of the masses.
Sunday, November 13, 2011 at 9:39pm by Leanne

physics
Vb = 0.24kg / 600kg/m^3 = 0.0004 m^3. = 400cm^3 = Vol. of block of wood. Mass = 400cm^3 * 0.001kg/cm^2 = 0.4 kg = mass of water displaced = mass of copper + block. Mass of CU = 0.40kg - 0.24kg = 0.16 kg
Tuesday, January 24, 2012 at 7:27pm by Henry

physics
Q1: The car moves forward by the reaction force from the ground, produced due to friction between tires and road. According to the Newton’s 3rd law F12 = F21 F(net)max = F(friction)max m•a = k• m•g a = k• g = 0.82•9.8 = 8.04 m/s^2.Q2: m1 =1.5 kg, ...
Monday, May 7, 2012 at 9:26pm by Elena

physics
Q1: The car moves forward by the reaction force from the ground, produced due to friction between tires and road. According to the Newton’s 3rd law F12 = F21 F(net)max = F(friction)max m•a = k• m•g a = k• g = 0.82•9.8 = 8.04 m/s^2 Q2: m1 =1.5 kg, ...
Monday, May 7, 2012 at 10:28pm by Elena

physics
Q1.The car moves forward by the reaction force from the ground, produced due to friction between tires and road. According to the Newton’s 3rd law F12 = F21 F(net)max = F(friction)max m•a = k• m•g a = k• g = 0.82•9.8 = 8.04 m/s^2 Q2. m1 =1.5 kg, ...
Sunday, May 6, 2012 at 6:17pm by Elena

physics
as there is no external force on the particle except the gravitation the centre of mass would go in same path as it would have gone before breaking.So after the broken pieces fall on ground their centre of mass should be at the range of the parabolic path. Range is R=[(u^2 ...
Friday, March 16, 2012 at 12:23am by bhawana

Physics
The mass of gravel is m2=441•2.67 = 1177.47 kg The law of conservation of linear momentum m1•v1= (m1+m2)v2 v2= m1•v1/(m1+m2) = =2150•2.29/(2150+1177.47)=1.48 m/s
Monday, November 19, 2012 at 4:12pm by Elena

Chemistry
Block A of an unknown metal has a volume of 125cm^3 . Block B of a different metal has a volume of 145cm^3. If block A has a greater mass than block B, what can be said if the relative densities of two metal?
Friday, January 18, 2013 at 2:27pm by Quan

Science
A block of mass 3.1 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 14 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 55 cm, assuming it started at rest:
Wednesday, November 30, 2011 at 5:44pm by John

Physics
A block of mass 3.1 kg hangs vertically from a frictionless pulley of mass 5.9 kg and radius 14 cm. Treat the pulley as a disk. Find: a) the acceleration of the block; b) the tension in the rope; c) the speed of the block after it has fallen 55 cm, assuming it started at rest:
Monday, November 28, 2011 at 3:53pm by warrren

Physics
Two blocks of masses m1 = 2.00 kg and m2 = 4.50 kg are each released from rest at a height of y = 5.80 m on a frictionless track, as shown in the figure below, and undergo an elastic head-on collision. (a) Determine the velocity of each block just before the collision. Let the...
Wednesday, November 7, 2012 at 12:31pm by Corey

science
at a construction site a crane lifts a block of mass,m,vertically upwards through a height of 70 m at constant speed by means of a strong cable.The block experiences a force of magnitude 8 N as a result of air friction as it is lifted vertically upwards. The cable does 377 860...
Tuesday, March 26, 2013 at 10:08am by Thalente

physics
A block of mass M is sliding down an inclined plane and is accelerating. Which of the following statements are true? Choices: True, False. A. The frictional force must be less than the component of Mg down the plane B. The normal force of the plane is greater than the weight ...
Wednesday, December 10, 2008 at 5:54am by Sandhya

physics
a mass m1 moves along the x-axis with velocity of magnitude v0 on a frictionless table. it strikes another mass m2 which is initially at rest. the mass m1 goes off along the the y-axis. if half the original kinetic energy is lost in the collision, with what speed and at what ...
Tuesday, November 30, 2010 at 6:07pm by shamrakh

Physics
write the net force equation, clockwise is positive. Net force= total mass* a M1*g-M2*g*sinTheta=(M1+M2)a find a. Tension: just above M2 m1(g-a)=T
Sunday, January 27, 2013 at 11:46pm by bobpursley

Physics 1
A horizontal force of 30 N pulls a block of mass 2.5 kg across a level floor. The coefficient of kinetic friction between the block and the floor is &#956;K = 0.25. If the block begins with a speed of 2.0 m/s and is pulled for a distance of 18 m, what is the final speed of...
Monday, October 8, 2012 at 8:38pm by John

Physics
A block of mass 0.5 kg rests on a smooth inclined plane. It is then pushed by a horizontal force of 16N. When the block has displaced 5m along the inclined plane. What would be the speed of the block if the plane is rough and a friction of 5N is acting on the block?
Sunday, December 5, 2010 at 8:03am by Alex

Physics HELP!!!!!!!!
When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4 Hz. Find the ratio m2/m1 of the masses. w= sqrt (k/...
Wednesday, April 4, 2007 at 8:53pm by Mary

physics
A bullet of mass 30 gms is fired into a wooden block with mass 15kg by mans of a spring.The wooden block hangs from the ceiling by a wire.If the bullet and the block rise 0.50 m and the spring constant is 2000N/m. calculate the compression of the spring.
Monday, June 18, 2012 at 7:07pm by Anonymous

Physics
A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. The unstretched length of the cord is L_0 and its mass is m, much less than M. The "spring constant" for the cord is k. The block is released and stops at the lowest...
Wednesday, December 2, 2009 at 9:32pm by Keith

physics
A block of mass M hangs from a rubber cord. The block is supported so that the cord is not stretched. The unstretched length of the cord is L0 and its mass is m, much less than M. The "spring constant" for the cord is k. The block is released and stops at the lowest ...
Tuesday, December 1, 2009 at 9:29am by Stephen

Physics
Block A and block B (see figure below) are forced together, compressing a spring (with spring constant k = 2220 N/m) between them 2 cm from its equilibrium length. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has ...
Thursday, October 7, 2010 at 9:01am by Todd

Physics
A uniform piece of wire, 30 cm long, is bent in the center to give it an L-shape. How far from the bend is the center of mass? I know that the center of mass is ([m1]x+[m2]x)/([m1]+m2]), but I don't quite understand how to apply it to this problem.
Monday, November 22, 2010 at 9:12pm by Avalon

Repost-Physics 1
A horizontal force of 30 N pulls a block of mass 2.5 kg across a level floor. The coefficient of kinetic friction between the block and the floor is ìK = 0.25. If the block begins with a speed of 2.0 m/s and is pulled for a distance of 18 m, what is the final speed of ...
Tuesday, October 9, 2012 at 9:19pm by John

physics
A block of mass 4.253 kg is released on the track at a height 5.52 m above the level surface. It slides down the track and makes a head-on elastic collision with a block of mass 17.012 kg, initially at rest. The acceleration of gravity is 9.8 m/s2 . Calculate the height to ...
Wednesday, October 27, 2010 at 7:55pm by paul

PHYSICS HELP MEEE SO CONFUSED
1) From the height H that the block+bullet rises, assuming conservation of energy for the process, calculate the initial velocity V' of the block after the bullet is embedded. (m+M) V'^2/2 = (m+M) g H V' = sqrt(2 g H) = 2.62 m/s 2) Momentum (but not mechanical ...
Monday, December 5, 2011 at 5:02pm by drwls

physics (lVERY LONG)
A force of 200 N is being exerted on a blocki, which has a mass of 10 kg and is on 30 degrees inclined plane. The force is acting up the plane and parallel to it. The coefficient of friction between the block and the plane is .3 and the plane is 12 m long. a. What is the ...
Monday, November 22, 2010 at 7:18pm by rhet butler

college physics
Use the formula for head-on elastic collisions that you will find at: http://hyperphysics.phy-astr.gsu.edu/hbase/elacol2.html For the colliding neutron of mass m1, Vf = Vi * (m1 - m2)/(m1 + m2) m2 is the mass of the particle it collides with. The largest mass loss will be in ...
Thursday, March 18, 2010 at 11:08pm by drwls

Physics
Imagine a right-angle triangle with angle &#952; = 40o on the left. The serves as an increasing slope. On the slope is an object of mass m1= 340 g on an inclined surface. The angle of the inclined surface is &#952; = 40o with the horizontal. The object m1 is connected ...
Tuesday, October 6, 2009 at 1:45pm by lynn

Physics
Imagine a right-angle triangle with angle &#952; = 40o on the left. The serves as an increasing slope. On the slope is an object of mass m1= 340 g on an inclined surface. The angle of the inclined surface is &#952; = 40o with the horizontal. The object m1 is connected ...
Tuesday, October 6, 2009 at 12:41pm by LeahHH

physics
A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is 5.0 m/s^2 [E] and it takes 2.5s to stop. How...
Tuesday, March 27, 2012 at 11:20pm by Isabella

physics
A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is 5.0 m/s^2 [E] and it takes 2.5s to stop. How...
Tuesday, March 27, 2012 at 11:18pm by Isabella

Physics
A bullet of mass 0.06kg is fired horizontally with a muzzle speed of 700 m/s into a pendulums hanging block of mass 2.0kg. The block and the bullet then move up a height, h, above the pendulums equilibrium position. What is the speed of the bullet/block combination after the ...
Thursday, March 15, 2012 at 4:31pm by Erin

Physics
A 90.0 kg block and a 40.0 kg block are connected by a rope that passes through two (frictionless, massless) pulleys as shown. When released, what is the acceleration of the larger block? What is the tension in the rope?
Wednesday, July 25, 2012 at 8:20pm by Zac

physic
Hi!An object with mass m1 = 5.00 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2 = 10.0 kg, as shown in the figure below. Find the acceleration of each object and the ...
Friday, October 9, 2009 at 3:19am by Chan

physics
A bullet of mass m=10 g is fired with initial speed vi = 400 m/s into a block of mass M=2 kg initially at rest at the edge of a frictionless table of height h=1 m as shown in the figure. The bullet remains in the block, and after the impact the block lands a distance d from ...
Monday, January 14, 2013 at 2:16pm by tami

Physics
In figure, the mass m2 = 10 kg slides on a frictionless shelf. The coefficients of static and kinetic friction between m2 and m1 = 5 kg are µs = 0.6 and µk = 0.4. (a) What is the maximum acceleration of m1? (b) What is the maximum value of m3 if m1 moves with m2 ...
Monday, October 17, 2011 at 10:32pm by Eric

science
In the system shown in the figure , block A has mass m_A = 2.08 kg, block B has mass m_B = 0.370 kg, and the rope connecting them has a nonzero mass 0.203 kg. The rope has a total length 1.03 m and the pulley has a very small radius. Let d be the length of rope that hangs ...
Tuesday, January 18, 2011 at 10:30pm by Will

Physics
A block is pulled 2.9 meters up a 30° rough incline by an applied force Fa = 170 N, directed up the ramp. The frictional force has a magnitude of 90 N. The block starts from rest and has a final kinetic energy of 16 J. Find the following: a) The total work done on the ...
Thursday, February 18, 2010 at 10:34pm by Dar

Physics
A spring of k=11 N/m has a block of mass 4 kg attached to it on a frictionless table. If the block is pulled a distance 0.15 m to the right and released from rest, how long will it take the block to return to its equilibrium position?
Monday, April 28, 2008 at 3:08pm by Charlie

Physics
The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a height of 0.91 m above the floor. When m1 hits the ground its speed is 1.5 m/s. Assume that the pulley is a uniform disk with a radius of 12 cm. ...
Monday, March 8, 2010 at 10:28pm by Jon

Physics
The two masses (m1 = 5.0 kg and m2 = 3.0 kg) in the Atwood's machine shown in Figure 10-23 are released from rest, with m1 at a height of 0.87 m above the floor. When m1 hits the ground its speed is 1.4 m/s. Assume that the pulley is a uniform disk with a radius of 12 cm. ...
Monday, March 8, 2010 at 8:10pm by Mary

physics
A copper block with a mass 1.82 kg is given an initial speed of 3.5 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. Assume that 77.4 % of the initial kinetic energy is absorbed by the block in form of heat, what is the change in ...
Thursday, February 9, 2012 at 5:23pm by Sam

Physics
For an elastic collision, both momentum and kinetic energy are conserved. m1 = mass of colliding ball m2 = mass of ball initially at rest v1i = initial speed of colliding ball v1f = final speed of colliding ball v2i = initial speed of at rest ball = 0 v2f = final speed of at ...
Friday, November 9, 2012 at 12:52pm by Jennifer

mass of block?
Need to know mass of the block to do conservation of momentum.
Tuesday, December 20, 2011 at 2:19pm by Damon

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