Number of results: 31,751
Physics
Can someone actually ANSWER the question pleas and post numerical answers. Under less than ideal conditions, a student pushes a 6 kg cart holding 2 boxes of books up a ramp to a platform that is 1.8 m high in 42 sec. Each box contains 12 kg of books. The ramp is inclined at an...
Thursday, April 8, 2010 at 6:31pm by Ron
math
Do you mean sin-1(0.398) = ? ° ? ' ? " = 23.45320822° multiply the decimal part by 60 =23°27.19249' multiply the decimal part by 60 =23°-27'-11.55" (approx.) =23°-27'-12" (nearest second)
Saturday, May 25, 2013 at 6:18pm by MathMate
Trig
The state highway commission has decided to build a bridge over a dangerous railroad crossing. The approach ramp has to be constructed so that the bridge is 10 meters above the track. If the maximum desired grade of this ramp is 4 degrees, how far back from the edge of the ...
Saturday, October 24, 2009 at 11:58am by Anonymous
physics
A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
Wednesday, February 29, 2012 at 3:39pm by Angel
physics
A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
Tuesday, February 28, 2012 at 8:18pm by Angel
Math
2*cos120 + i2*sin120. X = hor = 2*cos120 = -1. Y = VER = 2*sin120 = 1.732. tanA = Y/X = 1.732/-1 = -1.732, A = -60 deg = 300 deg CCW. R = X/cosA = = -1/cos300 = -2 = Resultant. R = -2 @ -60 deg = -2 @ 300 deg CCW. 4*cos7pi/4 + i4*sin7pi/4, 7pi/4 = 7*180/4 = 315 deg. X = hor = ...
Sunday, October 17, 2010 at 9:10pm by Henry
Physics
The acceleration rate down the plane is a = g sin A, where A is the angle the ramp makes to the horizontal. The total length L that it must travel is L = H/sin A, where H is the height that it must fall. The time T required to travel the length of the ramp is such that (1/2) a...
Sunday, November 18, 2007 at 6:42am by drwls
Physics
a horizontal force of magnitude 18.0 N is applied to a 3.07 kg book as the book slides a distance d = 0.34 m up a frictionless ramp at angle è = 30°. The book begins with zero kinetic energy. What is its speed at the end of the displacement?
Tuesday, October 9, 2012 at 11:25pm by Emily
Chemistry Help
Sorry for the missing words I writing this again: For 4s, the box has two arrows going up. For 3d, there were five boxes. The first three boxes had two arrows are up and down (correctly) in each box. The fourth box has an arrow going up. And the, fifth box is empty. So, is ...
Sunday, November 21, 2010 at 3:13pm by Sarah
physics
A man pushes on a piano of mass 180 so that it slides at a constant velocity of 12.0 down a ramp that is inclined at 11.0 above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push A. if the man pushes parallel to ...
Monday, November 8, 2010 at 5:12pm by bob
Geography
What is the time and day at a certain place X (Lat 25 deg N,Long 33 deg W) when at is 2.30 AM on Thurs Day at a place Y (Lat 25 deg S,Long 27 deg E) ?
Tuesday, May 3, 2011 at 1:31am by Sumit Guha
Calculus 2
That was the only thing the question said :/. It never gave a description of the pens. There is a picture with 6 boxes connected to each other 3 boxes on top and 3 on bottom: box box box box box box other than that, that was all the info I was given:(
Wednesday, April 10, 2013 at 1:12pm by Henry
Physics
When I look into my beautiful 1981 Vanagon's rear view mirror, I see a semi-truck coming toward me way too fast. The truck has lost its brakes and is traveling at 140 km/hour down the steep mountain road we're on. At the last second, the truck exits onto an escape ramp...
Tuesday, October 9, 2012 at 10:43pm by Dianne
Trig
Correction: A = 90 - 73.3 = 16.7 deg. B = 90 - 59 = 31 deg. B - A = 31 - 16.7 = 14.3 deg. B is 14.3 deg. Larger than A.
Sunday, August 28, 2011 at 2:39pm by Henry
PHYSICS*****
A block of mass m = 300 g is released from rest and slides down a frictionless track of height h = 59.4 cm. At the bottom of the track the block slides freely along a horizontal table until it hits a spring attached to a heavy, immovable wall. The spring compressed by 2.21 cm ...
Wednesday, March 21, 2012 at 9:10pm by Steve
physics
A m = 2.51 kg mass starts from rest and slides a distance d down a frictionless theta = 34.6° incline. While sliding, it comes into contact with an unstressed spring of negligible mass. The mass slides an additional 0.220 m as it is brought momentarily to rest by ...
Saturday, October 31, 2009 at 3:24pm by Anonymous
science
X = Hor = 1.5 + 4.5 = 6 m. Y = Ver. = -2 m. tanA = Y/X = 6 / -2 = -3 A = -71.6 Deg. = 360 - 71.6 = 288.4 Deg. CCW. R = X/cosA = 6 / cos288.4 = 19 m. @ 288.4 Deg. = Resulting displacement.
Saturday, July 21, 2012 at 2:49am by Henry
math
cos(3theta/2 -48deg) = -1/2 3theta/2 -48 = 120 deg or 240 deg 3 theta/2 = 168 or 288 deg theta = 112 or 192 degrees
Tuesday, February 7, 2012 at 7:23am by drwls
physics
In a local bar, a customer slides an empty beer mug down the counter for a refill. The bartender is momentarily distracted and does not see the mug, which slides off the counter and strikes the floor at distance d from the base of the counter. The height of the counter is h. (...
Friday, February 18, 2011 at 2:12pm by eric
Physics
Better, what is the net force on the crate. friction force up ramp: 3N gravity force down ramp: mg*sin35 net force=gravity-friction = mass*acceleration so acceleration= netforce/mass Vf^2=Vi^2 + 2*acceleartion*distance
Monday, March 25, 2013 at 4:09pm by bobpursley
math
I do these by using combinations (since order does not matter) e.g. #1 prob = C(3,3)/C(7,3) = 1/35 b) C(4,3)/C(7,3) = 4/35 c) C(3,2)*C(4,1)/C(7,3) = 3*4/35 = 12/35 d) C(3,1)*C(4,2)/C(7,3) = 3*6/35 = 18/35
Wednesday, April 1, 2009 at 10:29am by Reiny
Science
Since the 2 forces are equal and 90 deg.apart, the rock will move North East which is 45 deg. CCW. tanA = Y/X = 10/10 = 1, A = 45 Deg.
Tuesday, November 29, 2011 at 7:55pm by Henry
physics
A skateboarder shoots off a ramp with a velocity of 6.4 m/s, directed at an angle of 61° above the horizontal. The end of the ramp is 1.4 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
Friday, January 20, 2012 at 12:17am by Anonymous
physics
A skateboarder shoots off a ramp with a velocity of 6.8 m/s, directed at an angle of 56° above the horizontal. The end of the ramp is 1.5 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
Thursday, September 8, 2011 at 8:33pm by bob
Physics
a block , mass .10 kg, slides from rest without friction down an inclined plane 2m long which makes an angle of 20 degrees with the horizontal.(a) WWhat force accelerates the block down the plane?(b)j What is the velocity of the block when it reaches the botton of the pplane...
Sunday, January 30, 2011 at 9:34pm by james
Physics
A 12 kg object is at the top of a 41 degree inclined ramp. It is released and it reaches the bottom of the 85 m ramp in 2.3 seconds. what is the force of friction between the object and the ramp? What is the coefficient of friction? Can someone help me with this question using...
Saturday, March 24, 2012 at 3:14pm by Armaan
physics
A winch is used to drag a 375 N crate up a ramp at a constant speed of 75 cm/s by means of a rope that pulls parallel to the surface of the ramp. The rope slopes upward at 33 degreesabove the horizontal, and the coefficient of kinetic friction between the ramp and the crate is...
Sunday, February 26, 2012 at 8:29pm by dillion
Physics
Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 720 N, and his speed at the bottom of the pole is 3.8 m/s. How far did he slide down the pole?
Tuesday, November 16, 2010 at 12:15am by Shannon
physics
A man is dragging a trunk up the loading ramp of a mover's truck. The ramp has a slope angle of 20 degrees, and the man pulls upward with a force F whose direction makes an angle of 30 degrees with the ramp. a) how large a forec F is necessary for the component F_x ...
Thursday, November 16, 2006 at 2:33pm by Chris
Physics
Hints: X-component of resultant = ∑Di*cos(θi) and Y-component of resultant = ∑Di*sin(θi) D(1)=145m, θ(1)=90-20=70° (from x-axis) D(2)=105m, θ(2)=-35° (from x-axis)
Friday, June 22, 2012 at 7:44am by MathMate
maths
Take x as east, and y as north, and the starting position as (0,0). The coordinates of the first stop are (-25cos(30°), -25sin(30°) The second stop is simply 30km towards +y, or (-25cos(30°), 30-25sin(30°) =(21.65,17.5) Use Pythagoras theorem to...
Monday, June 6, 2011 at 8:28pm by MathMate
macroeconomics
slides of your preferred city to relocate with your reasoning for this choice • 1–2 slides: Explain at least 2 reasons why housing prices vary from city to city • 3–5 slides: Explain 3–4 ways in which supply and demand affect the prices of the homes &#...
Saturday, August 27, 2011 at 1:39pm by koki
Physics
A rope attached to an engine pulls a 240 Newton crate up an 14.7 degree ramp at a constant speed. The coefficient of kinetic friction for the surfaces of the crate and ramp is .32. What is the magnitude of the force that the rope exerts on the crate parallel to the ramp? (...
Tuesday, October 4, 2011 at 2:09pm by Rachel
physics
Fn = 45N @ 90 Deg. + 60N @ 225 Deg. X = 45*cos90 + 60*cos225 = -42.43 N. Y = 45*sin90 + 60*sin225 = 2.57 N. tanAr = Y/X = 2.57 / -42.43 = -0.06066. Ar = -3.47 Deg. A = -3.47 + 180 = 176.5 Deg. Fn = X/cosA = -42.43 / cos176.5 = 42'51 N. @ 176.5 Deg.,CCW.
Tuesday, April 3, 2012 at 11:55pm by Henry
physics please help :/
A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
Thursday, March 1, 2012 at 5:11pm by Angel
trig
the component of weight down the ramp is 100sin10. This ignores friction.
Monday, March 19, 2012 at 7:08pm by bobpursley
Physics
A block of mass 4.6 kg slides 15 m from rest down an inclined plane making an angle of 20 o with the horizontal. If the block takes 10 s to slide down the plane, what is the retarding force due to friction?
Tuesday, February 21, 2012 at 5:06pm by Steve
Vectors
45 cm @ 53 deg. x = hor = 45*cos53 = 27.1 cm. y = ver = 45*sin53 = 35.9 cm. X + Yi = 27.1 + 35.9i.
Monday, November 1, 2010 at 5:39am by Henry
Engineering Physics
1) The work done by friction will equal the initial potential energy of compression in the spring, but will be of the opposite sign. Work is done against friction, not by it. 2) (1/2)kd^2 = M*g*u*X d is the initial spring compression. g is the acceleration of gravity M is the ...
Sunday, July 8, 2012 at 11:24pm by drwls
Physics
At the State Fair you see people trying to win a prize at a game booth. They are sliding a metal disk shaped like a puck up a wooden ramp so that it stops in a marked zone near the top of the ramp before sliding back down. You estimate that you can slide the 'puck' at ...
Tuesday, March 26, 2013 at 7:42pm by Brandon
PHYSICSSS
There was a ramp the two box where sliding toward to left seems like a 45 degree angle n first is m1 thn m2 does this helppp
Sunday, February 12, 2012 at 12:59am by Anonymous
physics
C = A - B , C = 4 @ 30 Deg - 3.46 @ 0 deg, X = Hor = 4*cos30 - 3.46 = 3.46 - 3.46 = 0, Y = Ver = 4*sin30 - 0 = 2, C = 0 + i2 = 2 @ 90 deg N of E.
Saturday, September 25, 2010 at 1:04pm by Henry
Physics
A 4 kg block slides down a frictionless incline making an angle of 60° with the horizontal. (a) What is the total work done on the block when the block slides 2 m (measured along the incline)? (b) What is the speed of the block after it has slid 1.5 m if it starts from ...
Wednesday, November 3, 2010 at 11:59pm by Jenni
Discrete Math
Can you check if there is a typo? As it is, f(x) is not onto, i.e. f(2)=f(3)=1. To find g°f, complete the following table: x u=f(x) g(u) = g ° f(x) 1 2 4 = g°f(x) 2 1 2 3 1 2 4 4 3 Therefore g°f : {(1,4),(2,2) ....} As supplementary information...
Tuesday, February 15, 2011 at 2:53pm by MathMate
trig
To limit the results to only one answer, the range must be limited to a value between 0 and 180 degrees: 0 < A < 180. secA = 1/cosA = -2, cosA = -1/2, A = 120 deg. secA = 1/cosA = -sqrt2, cosA = -1/sqrt2, A = 135 deg. cosA = -(sqrt3)/2, A = 150 deg. tanA = -sqrt3...
Saturday, September 3, 2011 at 3:57pm by Henry
physics
1. d = 20km @ 60deg. + 30km @ 0 deg. + 10km @ 90 deg. X = hor. = 20cos60 + 30km + 0, X = hor. = 10 + 30 = 40km. Y = ver. = 20sin60 + 0 + 10sin90, Y = ver. = 17.32 + 0 + 10 = 27.32km. tanA = Y / X = 27.32 / 40 = 0.4330, A = 23.4 Deg. d = X / cosA = 40 / cos23.4 = 43.6km @ 23.4 ...
Sunday, October 30, 2011 at 2:42pm by Henry
physics
A frictionless30degrees incline should provide an acceleration of 4.90m/s2 down the incline. A student with a stopwatch finds that an object, starting from rest, slides down a 15m very smooth incline in exactly 3s. Is the incline frictionless?
Tuesday, October 9, 2012 at 9:09am by julia
physics
A 2.25 kg ball experiences a net force of 965 N up a ramp. Once the ball reaches the top of the ramp, the force no longer acts. The force acts over a distance of 1.50 m on the ramp. Find the horizontal distance x that the ball travels before it hits the deck. The top of the ...
Wednesday, November 14, 2012 at 9:23pm by Anonymous
geometry
ABC = X deg. DEF = 7X deg. x + 7x = 180 deg. 8X = 180, X = ABC = 22.5 deg. 7X = DEF = 7 * 22.5 = 157.5 deg.
Thursday, March 10, 2011 at 4:47pm by Henry
Physics
A block slides from rest with negligible friction down a track, descending 5.0m to point P at the bottom. It then slides on the horizontal surface. The coefficient of friction between the block and the horizontal surface is 0.20. How far does the block slide on the horizontal ...
Saturday, December 29, 2012 at 9:44pm by Anonymous
physics
A 90kg gorilla slides down a jungle vine
Sunday, November 20, 2011 at 5:46pm by Gayanne
general
Which of the following would you use to sort through slides for a slide presentation? A. Camera B. Opaque Projector C. Copy machine D. Light box
Sunday, December 9, 2012 at 12:20am by khan
GENERAL
Which of the following would you use to sort through slides for a slide presentation? A. Camera B. Opaque Projector C. Copy machine D. Light box
Sunday, December 9, 2012 at 12:17am by khan
general
Which of the following would you use to sort through slides for a slide presentation? a. camera b. opaque projector c. copy machine d. light box
Saturday, December 8, 2012 at 10:21am by kan
Physics
c. The ball has a positive acceleration when rolling both up and down the ramp.
Thursday, January 19, 2012 at 12:49pm by Mishti
PHYSICS
A = 2(180/pi) = 114.59 deg. a = 114.59 deg/s^2. d = Vo + 0.5at^2 d = 0 + 0.5*(114.59)(2.3)^2=303.09 deg. 303.09 + 57.3 = 360.39 deg. P = 360.39 - 360 = 0.39 deg, CCW from x-axis.
Wednesday, July 13, 2011 at 10:56pm by Henry
physics
Forces down the ramp: m g sin 20 mu m g cos 20 Force up the ramp 1600 N so 1600 - m g sin 20 - mu m g cos 20 = m (.5)
Tuesday, November 4, 2008 at 7:15pm by Damon
Geometry
Vp = 200mi/h @ 180. Vw = 25mi/h @ 240 Deg. 1. X=Hor=200*cos180+25*cos240=-212.5 mi/h Y=Ver=200*sin180+25*sin240=-21.65mi/h Vp=sqrt((-212.50^2)+(-21.65)^2)=213.6 = Velocity of plane. 2. tanA = Y/X = -21.65 / -212.5 = 0.10188. A = 5.8 Deg. = Smallest angle. 3. C = 90 = Largest ...
Tuesday, June 5, 2012 at 6:59pm by Henry
physic
A block of mass 12.0 kg slides from rest down a frictionless 34.0° incline and is stopped by a strong spring with k = 2.5 104 N/m. The block slides 3.00 m from the point of release to the point where it comes to rest against the spring. When the block comes to rest, how ...
Wednesday, October 21, 2009 at 6:10pm by Chan
Discrete Math
f: A{2,4,6} -> B(21,42,52) (2,21),(4,42),(6,52) g: B(21,42,52) -> B(2,4,6) (21,4),(42,2),(52,6) (g°f)(2)=g(f(2))=g(21)=4 (g°f)(4)=g(f(4))=g(42)=2 (g°f)(6)=g(f(6))=g(52)=6 So both f and g are one-to-one and onto (i.e. injective and ...
Thursday, February 17, 2011 at 7:41am by MathMate
physics
A short box with a large flat base is made of iron. The box has mass mI = 890 kg and specific heat cI = 450 J/kg◦C. The box is filled with water. The water has mass mW = 1220 kg and specific heat cW = 4180 J/kg◦C. The box and water are initially at ...
Wednesday, March 14, 2012 at 1:29am by Jason
Physics
You set up a ramp on your desk at home. Marbles rolling down the ramp and horizontally off your desk consistantly land 52.0 cm from the base of your desk. Your desk is 69.0 cm high. If you pull your desk over to the window of your second story room and "launch" ...
Thursday, November 5, 2009 at 5:34pm by Anonymous
math / science
Charlie: 175 N. @ 152 Deg.,CCW. Sam: 200 N. @ 47 Deg.,CCW. X = 175*cos152 + 200*cos47 = -18.1 N. Y = 175*sin152 + 200*sin47 = 228.4 N. Alice: Force must be equal and opposite The vector sum of Charlie and Sam's force. X = 18.1 N. Y = -228.4 N. tanA = Y/X = -228.4 / 18.1...
Sunday, December 11, 2011 at 6:24pm by Henry
Physics
C = -1.6 - i7.7. Q3. tanAr = Y/X = -7.7 / -1.6 = 4.8125, Ar = 78.3 Deg. =Reference angle. A = 180 + Ar = 180 + 78.3 = 258.3 Deg. B = 9.4 @ (-14) Deg. C = -1.6 -i7.7. X = 9.4*cos(-)14 + (-1.6) = 7.52. Y = 9.4*sin(-14) + (-7.7) = -9.97. tanAr = Y/x = -9.97 / 7.52 = -1.3263, Ar...
Thursday, January 26, 2012 at 3:51pm by Henry
geometry
a = X deg., b = 3X deg, c = 6X-8 deg. a + b + c = 180 deg., X+3X+(6X-8)=180 Solve for x: X=18.8=a, b=3X=56.4 c=6X-8=104.8.
Tuesday, July 6, 2010 at 3:36pm by Henry
Physics
THe only forces are the gravity force, mg downward, and the force the plank is exerting, which is indeed normal to it's surface. But any vector can be broken into components. Break mg into two forces, one down the ramp, and one normal to the ramp. Why do this? It is ...
Saturday, July 11, 2009 at 5:24pm by bobpursley
Physics
C = -13.2 -i10.4. Q3. tanAr = Y/X = -10.4/-13.2 = 0.78788, Ar = 38.2 Deg. = Reference angle. A = 180 + Ar = 180 + 38.2 = 218.2 Deg., CCW. C = X/coswA = -13.2 / cos218.2 = 16.8 m/s @ 218.2 Deg. B = 100 - i106. Q4. tanAr = Y/X = -106 / 100 = -1.06, Ar = -46.67 Deg. A = Ar + 360...
Thursday, January 26, 2012 at 3:43pm by Henry
physics
A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp. (a) With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars, and the horizontal distance he must clear is 20m. (...
Monday, September 14, 2009 at 3:11am by perry
geometry
A ramp is built by putting a triangle on top of a trapezoid. How long is the ramp?
Tuesday, March 15, 2011 at 11:23pm by Anonymous
Physical science
When a crate slides down an incline at a constant velocity it is
Tuesday, March 5, 2013 at 10:00pm by Anonymous
physics
A skier slides down a slope to the left at a constant speed.
Monday, October 15, 2012 at 6:30pm by nhan
physics
what happens to the gravitational energy of a firefighter when he slides down the firepoles?
Sunday, December 5, 2010 at 9:07am by lester
pre calculus
Convert the given number into the form a+bi = α(cos(β)+i sin(β)) where α = sqrt(a^2+b^2) β = sin-1(b/α) If the number is plot in the complex (Z) plane, it will be more evident. For example, 64i will have α=64 (...
Friday, May 20, 2011 at 4:14pm by MathMate
Physics
Only if you got 180 degrees, but here in Texas, we only angle to ramp from zero to 89 degrees. At that point, all things not nailed fall off. What does CosTheta do between zero and 90 deg?
Thursday, October 22, 2009 at 3:15pm by bobpursley
Physics
A 16 kg box slides across the floor with an initial velocity of +7.8 m/s. It comes to a stop after sliding +14.6 m. How much friction was present?
Wednesday, November 28, 2012 at 8:38pm by Molly
physis
A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = .58 The angle of the incline, in degrees, is most nearly:
Friday, November 9, 2012 at 3:07pm by dee
physics
A 15 kg box slides across the floor with an initial velocity of +7.6 m/s. It comes to a stop after sliding +14.8 m. How much friction was present?
Monday, December 5, 2011 at 6:58pm by andrew
Physics
A man pushes on a piano of mass 180 kg so that it slides at a constant velocity of 12.0 cm/s down a ramp that is inclined at 11.0degrees above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push (a)if the man ...
Thursday, November 11, 2010 at 5:14pm by Carmen
PHYSICS !
If a ball is sliding down a ramp that is on a slant, so that the ball sliding down falls off. Is the speed of the ball constant(meaning staying at the same speed)? or Speeding up? If so, how?
Thursday, November 11, 2010 at 5:42pm by Kate
physics
Use F = Ma; a = F/M Divide the weight component down the ramp (M g sin 37) by M.
Friday, October 22, 2010 at 12:56am by drwls
physcs (Geometry bit)
how do you prove that an object on a ramp resolved into it's gravity components were the x dreiction is down the ramp and the y direction is the direciton of the normal force Force of gravity x component /\ |Normal force <_____| | /|OBJECT | /1| |2 / |Force of ...
Monday, August 10, 2009 at 10:35am by physcs (Geometry bit)
physics
A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp a)With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars, and the horizontal distance he must clear is 20m . ...
Saturday, November 24, 2012 at 9:16pm by juanita
physics
A 4.6 kg block starts at rest and slides a distance d down a frictionless 31.0° incline, where it runs into a spring. The block slides an additional 24.0 cm before it is brought to rest momentarily by compressing the spring, whose spring constant is 421 N/m. What is the ...
Wednesday, March 28, 2012 at 12:43pm by please help:)
college physics
A 30.3-kg child starting from rest slides down a water slide with a vertical height of 10.5 m. (Neglect friction.) (a) What is the child's speed halfway down the slide's vertical distance?
Monday, March 25, 2013 at 10:54pm by Anonymous
phys. help
A 30-kg child coast down a hill on a 20-kg sled. She pushes off from the top of the hill with a velocity of 1 m/s. At the bottom of the hill, she is moving 4 m/s. If there is no heat generated when she slides down, how high is this hill? thank u
Wednesday, March 5, 2008 at 5:35pm by Aulivia
Trig.
I have answers for these problems, but I wanted to check if I had them right because I wasnt sure on some of them....Thanks. Solve the triangle: 1. a=4, b=8, alpha=30 deg. answer- beta=90 deg., gamma=60 deg., c=7 2. a=5, b=7, alpha=30 deg. answer- beta=44 deg., gamma=106 deg...
Tuesday, December 12, 2006 at 6:00am by ashley
physics
The NET force up the incline must be Fnet = M*a = 5.05*4.3 = 21.72 N This equals the sum of of the applied force component up the ramp (Fap*cos36.5), minus the friction force (M*g*muk*cos36.5-Fap*sin36.5muk)) and minus the weight component down the ramp (M*g*sin36.5). Solve ...
Friday, March 15, 2013 at 1:04am by drwls
Physics
A 2.0kg wood block is launched up a wooden ramp that is inclined at a 26 angle. The block's initial speed is 8.0 m/s. The coefficient of kinetic friction of wood on wood is 0.200. a) What vertical height does the block reach above its starting point? Express your answer to...
Wednesday, October 10, 2012 at 2:59pm by senko
Physics
QUESTION: A 200 N/m, 5 m spring on a 20 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline will the block travel? How fast will it be traveling when it is 0.2 m up the incline? EQUATION: 1/2kx^2 + mgh + 1/2mv^2...
Tuesday, January 13, 2009 at 7:59pm by Phil
Physics
QUESTION: A 200 N/m, 5 m spring on a 20 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline will the block travel? How fast will it be traveling when it is 0.2 m up the incline? EQUATION: 1/2kx^2 + mgh + 1/2mv^2...
Tuesday, January 13, 2009 at 4:34pm by Phil
Physics
A 45 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 29 degrees, the crate begins to slide downward. What is the coefficient of static friction between the crate and the ramp? At what angle does the crate begin to slide...
Monday, February 22, 2010 at 10:26pm by Grace
Mathematics
d1 = 210km/h * 2h = 420 km @ 40 Deg. d2 = 210km/h * 0.5h = 105 km @ 125 Deg. X=hor.=420*cos40 + 105*cos125 = 262 m. Y=ver.=420*sin40 + 105*sin125 = 356 m. tanA = Y/X = 356 / 262 = 1.35878. A = 53.6 Deg. a. d = X/cosA = 262 / cos53.6 = 442 m = Dist. from C to A. b. Bearing = 53...
Sunday, January 29, 2012 at 10:15am by Henry
physics
Vo = (50m/s,45deg.). Xo = hor. = 50cos45 = 35.36m/s. Yo = ver. = 50sin45 = 35.36m/s. t(up) = (Vf - Yo) / g, t(up) = (0 - 35.36) / -9.8 = 3.61s. t(dn) = t(up) = 3.61s. T = t(up) + t(dn)=3.61 + 3.61=7.22s. = Time in flight. Dh = Xo * T = 35.36 * 7.22 = 255m. = Hor. distance. ...
Tuesday, October 11, 2011 at 1:09pm by Henry
maths
Center: A = 0 Deg. Left of Center: A = 15 Deg. Right of Center: A = 15 Deg. h = 45*sin15 = 11.65 cm.
Wednesday, May 11, 2011 at 10:35am by Henry
Math
The horizontal distance H is given. So the height h1 of the face from the observer's instrument = H tan(32°) The height h2 of the top from the observer's instrument = H tan(35°) So the height of the face is h2-h1.
Tuesday, May 17, 2011 at 7:12pm by MathMate
Physics
A bowling ball of mass M and radius R is thrown along a level surface so that initially ( t= 0) it slides with a linear speed but does not rotate, see the figure. As it slides, it begins to spin, and eventually rolls without slipping. How far has the ball moved down the lane ...
Sunday, December 4, 2011 at 1:44am by Helen
Physics
A bowling ball of mass M and radius R is thrown along a level surface so that initially ( t= 0) it slides with a linear speed but does not rotate, see the figure. As it slides, it begins to spin, and eventually rolls without slipping. How far has the ball moved down the lane ...
Sunday, December 4, 2011 at 1:43am by Helen
math
a ramp is 1m above ground level and starts 3m from a building. how long is the ramp?
Tuesday, May 15, 2012 at 9:13pm by sue
Calculus PLEASE check my work ,
1. Correct 2. Correct 3. dy/dx =(dy/dt) / (dx/dt) put x=rcos(t)=3cos²(t)= y=rsin(t)=3sin(t)cos(t) Calculate dy/dx and evaluate at t=120° (2π/3) to get dy/dx=-1/√3 => θ=150° Angle with radius vector=150°-120&...
Saturday, March 12, 2011 at 3:06am by MathMate
college physic
A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp.(a)With what minimum speed must he drive off the horiontal ramp?The vertical height of the ramp is 1.5m above the cars and the horizontal distance must be clear is 20m.(b)If the ...
Thursday, June 23, 2011 at 5:44am by noah
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