# A 3.00 kg block starts from rest at the top of a 27.0° incline and slides 2.00 m down the incline in 1.50 s.

37,838 results, page 67

### Physics

A 6.2 g bullet is fired into a 2 kg ballistic pendulum. The bullet emerges from the block with a speed of 281 m/s, and the block rises to a maximum height of 15 cm . Find the initial speed of the bullet. The acceleration due to gravity is 9.8 m/s 2 . Answer in units of m/s.

### physics, buoyance

A wood cube 0.20m on each side has a density of 730kg/m3 and floats levelly in water. Part A What is the distance from the top of the wood to the water surface? Part B What mass has to be placed on top of the wood so that its top is just at the water level?

### PHYSICS

Two objects are connected by a massless string as shown in the figure below. The pulley is massless and rotates without friction. The object of mass m = 1.7 kg slides without friction on an inclined plane which makes an angle of è = 38° with the horizontal. The object of ...

### Physics Force and Friction question

A crate of mass 100kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A horizontal force, F, or magnitude 350N is applied to the crate. Which of the following is true? ...

### math

Three points P, Q and R are on a level ground. Q is 240m from P on a bearing of 230°. R is 120m to the east of P. (a) Using a scale of 1cm to represent 40m, draw a diagram to show the positions of P, Q and R in the space provided below. (b) Determine : (i) the distance of R ...

### chemistry

why water expands when it freezes? Water expands when it freezes because it starts to bend. when all the water molecules are in this hexagonal structure, the same amount of water takes up more space than when the molecules are randomly arranged. For example- In the ocean where...

### physics

A 30kg box of vegetable moves down a 35 degree frictionless inclined. Find the resultant force down the inclined and the acceleration down the inclined

### Calculus

I really need help with this calculus question. I ve been struggling to figure it out. Imagine making a tent in the shape of a right prism whose cross section is an equilateral triangle (the door is on one of the triangular ends). Assume we want the volume to be 2.6m^3, to ...

### physics

The drive propeller of a ship starts from rest and accelerates at 3.00 10-3 rad/s2 for 2.05 103 s. For the next 1.75 103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30 10-3 rad/s2 until it slows (without reversing direction) to an angular ...

### physics

The drive propeller of a ship starts from rest and accelerates at 2.90×10-3 rad/s2 for 2.10×103 s. For the next 1.40×103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30×10-3 rad/s2 until it slows (without reversing direction) to an angular ...

### physics

The drive propeller of a ship starts from rest and accelerates at 2.95 10-3 rad/s2 for 2.05 103 s. For the next 1.90 103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30 10-3 rad/s2 until it slows (without reversing direction) to an angular ...

### Forces w/ tension

Assume that three blocks portrayed below move on a frictionless surface and that a 42 N force acts on the 3.0 kg block. Determine (a) the acecleration given the system, (b) the tension inthe cord connecting the 3.0kg and the 1.0 kg blocks, and (c) the force exerted by the 1....

### physics

A 250 g block is dropped onto a relaxed veritcal spring that has a spring constant of k=2.5 N/cm. The block becomes attached to the spring and compresses the spring 12 cm befor momentarily stopping. While the spring is being compressed, what work is done on the block by a) the...

### Physics

A car is towing a boat on a trailer. The driver starts from rest and accelerates to a velocity of +14 m/s in a time of 25 s. The combined mass of the boat and trailer is 401 kg. The frictional force acting on the trailer can be ignored. What is the tension in the hitch that ...

### Maths

suppose function f,g,h and l are defined as follow:f(x)=4xsquared-5x+1,g(x)=-1/2x-3,h(x)=squared root(2-x)squared+1/2x,l(x)=square root2-x-3. .write down Df and solve inequality f(x)<0 .write down Dg and solve 4g(x)=8 .write down Dh,Dg+h and solve the (g+h)(x)=0 .write down...

### Physics

A 26.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.490 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually...

### Physics

For each of the following scenarios, indicate whether the oscillation period of the block becomes shorter, longer or remains unchanged. Note: you must clearly mark your answer (for example, highlight it in red) from the multiple-choice list below and you must provide an ...

### Chemistry

CH3CH2CH2CH( a c on top of the ch and a triple bond on top of the c)CH2CH2CH2CH3

### physics please!

A 0.21 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by x = (16 cm)cos[(16 rad/s)t + π/2 rad] What force, applied to the block by the spring, results in the given oscillation? why ...

### Physics

A 0.250 kg block on a vertical spring with a spring constant of 4.09 × 10 3 N/m is pushed downward, compressing the spring 0.0900 m. When released, the block leaves the spring and travels upward vertically. The acceleration of gravity is 9.81 m/s 2 . How high does it rise ...

### English

1. He was taking down what she said. 2. He was noting down what she said. 3. He was writing down what she said. ------------------------ Are they all grammatical? Can we use some other expressions?

### Physics

A car traveling at a constant speed of 33 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.62 m/s^2. How long after the trooper starts the chase does he overtake the speeding car? (answer in units of s)

### Physics

A car traveling at a constant speed of 33 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.62 m/s^2. How long after the trooper starts the chase does he overtake the speeding car? (answer in units of s)

### Physics

A car traveling at a constant speed of 39.6 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.25 m/s^2 . How long after the trooper starts the chase does he overtake the speeding car? Answer in units of s

### algebra

A rock is thrown upward with a velocity of 15 meters per second from the top of a 26 meter high cliff ad i misses the cliff on the way back down. when will the rock be 5 meters from the water below?

### Algebra II

A rock is thrown upward with a velocity of 19 meters per second from the top of a 21 meter high cliff and it misses the cliff on the way back down. When will the rock be 11 meters from the water below?

### Math

A rock is thrown upward with a velocity of 24 meters per second from the top of a 50 meter high cliff and it misses the cliff on the way back down. When will the rock be 7 meters from the water below

### Math

A 25ft ladder leans up against the side of a house, with the base of the ladder a distance 3ft from the wall. If the ladder is moved out by 5ft, how far down the wall will the top of the ladder move?

### math

A rock is thrown upward with a velocity of 25 meters per second from the top of a 50 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water, below?

### physics

A spring-like trampoline dips down 0.08 m when a particular person stands on it. If this person jumps up to a height of 0.26 m above the top of the trampoline, how far with the trampoline compress when the person lands?

### Trigonomentry

A ladder 35 foot long is leaning against an embankment, inclined 62.5 degrees to the horizontal. if the bottom of the ladder is 10.2 feet from the embankment, what is the distance from the top of the ladder down to the embankment to the ground?

### Trigonomentry

A ladder 35 foot long is leaning against an embankment, inclined 62.5 degrees to the horizontal. if the bottom of the ladder is 10.2 feet from the embankment, what is the distance from the top of the ladder down to the embankment to the ground?

### Earth Science - Please Check My Answer

Please help with the following: How does sleet differ from snow? A. It is not a form of precipitation. B. It is liquid and not ice. C. It starts as rain and freezes in the air. D. It starts as water vapor and changes to a solid. I know that answer is not D because I got it ...

### Trigonometry

I am trying to help my son with his math, but I am stuck! The advertisement for a new shoe promises runners less slip. The coefficient of friction (μ) between concrete and a new material used in the sole of this shoe is 1.5. The force of friction that causes slip is equal...

### Physics

A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and air drag acting on ...

### Physics

A very large roller coaster has an initial hill that has an 85 m drop. Note that a roller coaster has no engine. After being pulled up the first hill by a chain the train moves along the track with only gravity, normal forces due to the track, friction and air drag acting on ...

### physics

a stone is dropped from rest at the top of a mine shaft. it takes 59 s for a stone to fall to the bottom of a mine shaft. how deep is the shaft? the acceleration of gravity is 9.8 m/s2

### physics

A stone is dropped from rest at the top of a mine shaft. It takes 58 s for a stone to fall to the bottom of a mine shaft. How deep is the shaft? The acceleration of gravity is 9.8 m/s2 .

### Physics

A punter drops a .43 kg football from rest vertically 1 meter down onto his foot. The ball leaves his foot with a speed of 18m/s at an angle of 55* above the horizontal. What is the impulse delivered by the foot (magnitude and direction)?

### keybording and word processing

11. The main difference between block letter style and modified block letter style is/are the? a. left and right margin settings, b. punctuation style, c. position of the date and closing lines, d. line spacing

### physics

a bullet of mass of 12 grams is fired into a large block of mass 1.5 kg suspended from light vertical wires. the bullet imbeds in the block and the whole system rises 10 cm. find the velocity of the bullet just before the collision.

### College Physics

A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane are, respectively, 0....

### Physics

A 0.500 kg bead slides on a straight frictionless wire with a velocity of 1.50 cm/s to the right. The bead collides elastically with a larger 0.750 kg bead initially at rest. After the collision, the smaller bead moves to the left with a velocity of 0.70 cm/s. Find the ...

### Physics

A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are then applied and the car is brought to rest in...

### physics

A bullet of mass 100g is fired at avelocity 100m/s into a wooden block of mass 900g.If the bullet gets embeded into the block,then what would be the velocity of the system?

### physics

A 5.0 MULTIPLIED BY 10 TO THE POWER OF 2g aluminium block is heated to 350 degrees celcius. determine the number of kilograms of ice at 0 degrees celcius that the aluminium block will melt as it cools.

### math

a cord is used to lower vertically a block of mass M a distance d at a constant downward acceleration of 1\4 g, find the work done by the cord on the block ? FIND THE WORK DONE BY THE FORCE OF GRAVITT

### Chemistry 2

36.) Suppose a chemistry student discoveres that a block of pure ice is left on her porch as she goes to school one day. What will be the percent composition of the pure ice block?

### math

Car Insurance Use the histogram below to answer the following questions. a)How many students were surveyed? b)What are the lower and upper class limits of the first and second classes? c)How many students have an annual car insurance premium in the class with a class mark of $...

### Physics

A solid disk is released from rest and rolls without slipping down an inclined plane that makes an angle of 25.0° with the horizontal. What is the speed of the disk after it has rolled 3.00 m, measured along the plane?

### Geometrt

Casey sights the top of an 84 foot tall lighthouse at an angle of elevation of 58 degrees. If casey is 6 feet tall, how far is he standing from the base of the lighthouse?........ Do I use cos, tan, or sin? I did the rest of the worksheet but I'm not sure for this one

### Physics

A 10 kg block sits on a flat surface whose μs=0.60 and whose μk is 0.40 a. What horizontal force is required to get the block move? b.If we continue to apply the same force as in part a. what will the blocks acceleration be?

### Physics

A 10 kg block sits on a flat surface whose μs is 0.60 and whose μk is 0.40 a. What horizontal force is required to get the block move? b.If we continue to apply the same force as in part (a) what will the blocks acceleration be???

### physics

A 2.50m -long, 450g rope pulls a 10.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.50m/s2 . How much force pulls forward on the rope?

### PHYSICS

Suppose you are hiking down the Grand Canyon. At the top, the temperature early in the morning is a cool 3.36 °C. By late afternoon, the temperature at the bottom of the canyon has warmed to a sweltering 33.1 °C. What is the difference between the higher and lower ...

### Physics

A 26.0 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley (Fig. 4-57). The coefficient of static friction between the table and the block is 0.490 and the coefficient of kinetic friction between the table and the block is 0.320. Sand ...

### Physics (been trying all day)

A 62.6 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 11.0 kg oxygen tank in a direction away from the shuttle with a speed of 13.3 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut ...

### Physics

A ladder, mass 40 kg, 5 m long, is leaning against a vertical frictionless wall at an angle of 50egrees to the vertical. It is about to slip. What is the coefficient of friction on the floor? A man mass,80 kg,starts to climb up the ladder at 500. Measuring along the ladder how...

### physics

A car and a motorcycle start from rest at the same time on a straight section of the road. However, the motorcycle starts 29.6 m behind the car. The car accelerates at a uniform rate of 3.9 m/s^2 while the motorcycle accelerates at a constant rate of 4.2 m/s^2. How much time ...

### Physics

A 44 kg skier starts from rest at a height of H = 18 m above the end of the ski-jump ramp. As the skier leaves the ramp, his velocity makes an angle of 28° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. (a) What is the maximum ...

### physics

A ring fixed to a support at the top is hanging vertically. A bead of mass m slides through the ring and is connected to the support through a spring of stiffness k as shown in the figure-1. The length of the unstretched spring is almost negligible. Note that gravity acts. a. ...

### physics

A 685 kg elevator starts from rest and moves upward for 2.80 s with constant acceleration until it reaches its cruising speed, 1.71 m/s. (a) What is the average power of the elevator motor during this period? (b) What is the average power during an upward cruise with constant ...

### Trigonomety

Two buildings are 30 ft apart. The angle of elevation from the top of one to the top of the other is 19°. What is their difference in height?

### Math

A 3 foot long pole leans against a wall. The bottom is 5 feet from the wall. How much farther should the bottom be pulled away from the wall so that the top moves the same amount down the wall?

### law

Does inspirational appeal always have to be engaged from a "top- down" approach? Can a leader develop a team where he becomes nearly "lateral" to his team at times that an inspirational appeal is employed, especially if it is genuine?

### physics

Two blocks of equal masses are connected by a string. Block 1 is pulled by a force of 30 N which accelerates both blocks at 3 m/s2 along a surface of negligible friction A) find the masses of each block B) find the tension

### Physics

a block of mass 1500kg lying steady on horizontal surface of a table needs 200N horizontal force to come in motion. What is coefficient of static friction between the block and the surface of table

### Physics

a block of mass 1500kg lying steady on horizontal surface of a table needs 200N horizontal force to come in motion. What is coefficient of static friction between the block and the surface of table

### physics

a bock with mass 60kg sits on a surface with static friction Us = 0.51. a spring (k = 69N) is stretched horizontally by 11cm but the block is still stationary. What is the friction force felt by the block when stretched 11cm?

### Physics

A bloc of 10 kg is put at the top of an inclined plan of 45 degrees (to the left), attached to a spring which has a spring constant of 250 N/m. The coefficient of kinetic friction between the bloc and the surface of the inclined plan is of 0,300. What is the maximum elongation...

### physics

Three ants are sitting on the vertices of equilateral triangle of side a. At t=0 and ant 1 starts approaching ant 2 with a speed v ,ant 2 starts approaching ant 3 with a speed v, and ant 3 starts approaching ant 1 with speed v.The three ants meet at the centroid of the ...

### Physics

A swimmer dives off a block into the water. The block is 31 inches above the surface of the water. Using projectile motion, what angle did they dive to reach point A on the surface of the water? I don't know what the variables stand for in this problem. Xf = Xi + Vixt + 1/2axt^2

### Physics-Mechanics

horizontal surface. The block is connected by a cord passing over a pulley to another block of mass 5.53 kg which hangs in the air, as shown on the following picture. Assume the cord to be light (massless and weightless) and unstretchable and the pulley to have no friction and...

### Physics

A 0.250 kg block on a vertical spring with a spring constant of 4.09 × 103 N/m is pushed downward, compressing the spring 0.0900 m. When released, the block leaves the spring and travels upward vertically. The acceleration of gravity is 9.81 m/s2 . How high does it rise above...

### physics - Energy

A 0.280 kg block on a vertical spring with a spring constant of 4.12 × 10^ 3 N/m is pushed downward, compressing the spring 0.0600 m. When released, the block leaves the spring and travels upward vertically. The acceleration of gravity is 9.81 m/s^ 2. How high does it rise ...

### Physics

A 2.0kg block hang from a vertical spring causes it to stretch by 200cm. If the 2.0kg block is replaced by a 0.50kg mass and the spring is stretched and released, what are the frequency and period of the oscillations? Please help and provide solutions and explanations. Thank ...

### Physics

A 17.9 kg block is dragged over a rough, hor- izontal surface by a constant force of 74.1 N acting at an angle of angle 32.3◦ above the horizontal. The block is displaced 72.4 m and the coefficient of kinetic friction is 0.242. Find the work done by the 74.1 N force. The...

### Physics

A 0.340 kg block on a vertical spring with a spring constant of 4.09 × 103 N/m is pushed downward, compressing the spring 0.0700 m. When released, the block leaves the spring and travels upward vertically. The acceleration of gravity is 9.81 m/s2 . How high does it rise above...

### science

a constant force applied at an angle of 20 above the horizonal , pulls a 200 kg block, over a distance of 3 m, on a rough, horizontal floor. the coefficient of kinetic friction is 0.2 show that work done by the kinetic frictional force on the block can be written as Wfk = ( -...

### math

A diagram shows the design of the 12 in quilt (12" x 12") block that a quilter is sewing. What are the dimensions of each triangle in the quilt block? What are the dimensions of each triangle to the nearest tenth of an inch?

### Math trig

Two towers 50 meters apart from the top of the shorter tower to the top of the taller tower 43 degree elevation, depression from the top of shorter tower to the bottom of the taller tower is 36 degrees what is the height of each tower?

### math

Diagram: OAZ line on top horizontal OXB line vertical under O BYA line diagonal from B to A to form a triangle which is OBA In the middle of O and B there is a line to show x which is nearer to B. In the middle of line BA there i s a line to sow Y in the middle. Question: OAB ...

### Chemistry

In the reaction: Protection of 1-Phenylethanol by 3,4-Dihydro-2H-pyran, 1-phenylethanol, 3,4-Dihydro-2H-pyran and anhydrous ether were added first and stirred in ice-water bath before acid catalyst p-toluenesulfonic acid monohydrate was added. The reaction was kept at 0 deg ...

### Grade 12 Physics

This question came up on my review package tonight, and it has me stumped. "A box of mass 14.5kg slides at a constant speed of 4.70m/s down a ramp at 35.3 degrees below the horizontal. What is the force of friction on the box?" I can calcuate force of friction on accelerating ...

### Physics

the motion of two students- Mac (starts @ 2m) and Tosh (starts @ 12m) - as they enter and exit the school library during a passing period determine the sppeds at which the two students move than determine how much faster the fastest student moves thatn the slower student?

### Physics

A 1900 car starts from rest and drives around a flat 50--diameter circular track. The forward force provided by the car's drive wheels is a constant 1300 . A) What is the magnitude of the car's acceleration at ? B) What is the direction of the car's acceleration at ? Give the ...

### PHYSICS

A golf ball (m=0.46g is struck by a club on a 50 deg. angle over 7ms. If the bll lands 200 m away, what is the force delivered to it by the club

### 5th grade math

I'm very confuse how to do this angle i have an triangle up side down lke pizza shape K.50_____50.R Y it look just like letter V with the line on top of it. sorry,I don't know how to connect the line from y to k than y to R. but, i think you get what i'm tried to say.. so how ...

### physics

for the current density equation (I) , solve for dV/dx when I = 0 I = - [ uz2F[C] dV/dx + uzRT d[C]/dx] According to your equation. dV/dx= uzRT/uz2[C] d[C]/dx I am uncertain what your symbols mean. It's supposed to be the current density equation I think?? My teacher also gave...

### physics

A man pulls a crate of mass 63.0 kg across a level floor. He pulls with a force of 174.0 N at an angle of 22.0° above the horizontal. When the crate is moving, the frictional force between the floor and the crate has a magnitude of 124.0 N. If the crate starts from rest, how ...

### physics

A man pulls a crate of mass 53.0 kg across a level floor. He pulls with a force of 180.0 N at an angle of 28.0° above the horizontal. When the crate is moving, the frictional force between the floor and the crate has a magnitude of 124.0 N. If the crate starts from rest, how ...

### Physics

A turtle is moving with a constant acceleration along a straight ditch. He starts his stopwatch as he passes a fence post and notes that it takes him 10s to reach a pine tree 10 m farther along the ditch., As he passes the pine tree, his speed is 1.2m/s. How far was he from ...

### Physics

A man pulls a crate of mass 61.0 kg across a level floor. He pulls with a force of 186.0 N at an angle of 22.0° above the horizontal. When the crate is moving, the frictional force between the floor and the crate has a magnitude of 120.0 N. If the crate starts from rest, how ...

### physics

A bullet of mass 10 g has a speed of 500 m/s. a) What is its kinetic energy? b) if it penetrates a block of wood a distance of 10 cm before coming to rest, what is the average frictional force stopping the bullet? A second bullet identical to the first is shot through a sheet ...

### chemistry

calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant concentration to decrease to 0.00269 M

### chemistry

calculate the half-life of a first- order reaction if the concentration of the reactant is 0.0396 M at 12 seconds after the reaction starts and is 0.00579 M at 47 after the reaction starts. How long does it take for the reactant concentration to decrease to 0.00269 M

### physics

A pair of blocks, one 3 times as massive as the other, are connected by a compressed spring. When the spring is released, the blocks fly apart. Compared to the heavier block, how many times faster does the lighter block accelerate?

### Help me! Physics

A block of aluminum with a mass of 2.6 kg is at 13C and comes in contact with a hot block of copper with a mass of 10.2 kg at 93C. What is the equilibrium temperature in Celsius degrees? caluminum = 0.22 kcal/kgC ccopper = 0.093 kcal/kgC

### physics laws of motion

a block of mass 300kg is set into motion on a frictionless horizantal surface with help of frictionless pulley and a rope system.what horizantal force F should be applied to produce an acceleration of 1m/s in block