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Recent Homework Questions About Physics

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physics
four particles each of mass 1kg at rest of four corners of a square as shown in the fig . find the coordinates of the mass of the system
Friday, October 12, 2012 at 11:47am

Physics
A 2.7 kg bucket of water is raised upwards by a rope. If the bucket has an acceleration of 3.4 m/s/s, find the force exerted by the rope on the bucket.
Friday, October 12, 2012 at 10:01am

Physics
A car with a mass of 1797 kg is moving to the right at a constant velocity of 2.50 m/s. What is the net force acting on the car?
Friday, October 12, 2012 at 10:01am

Physics
On an aircraft carrier, a jet can be catapulted from 0 to 155 mi/h in 2.00 s. If the average force exerted by the catapult is 5.53×106 N what is the mass of the jet?__________ kg
Friday, October 12, 2012 at 10:00am

Physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.50 x 105 kg, its speed is 27.0 m/s, and the net braking force is 4.73 x 105 N. (a) What is its speed 7.50 s later? (b) How far has it traveled in this time? (a) Its speed 7.50 s ...
Friday, October 12, 2012 at 10:00am

physics
A toy cannon fires a .11 kg shell with initial velocity vi=10m/s in the direction 52 degrees above the horizontal. The shell's trajectory curves downward because of gravity, so that time t=.61 s the shell is below the straight line by some vertical distance deltaH. find ...
Friday, October 12, 2012 at 9:13am

physics
a roller whose diameter is 20 in weight 72 lbs. what horizontal force is necessary to pull the roller over a brick 2 in high when (a) the force is applied to the center, (b) at the top
Friday, October 12, 2012 at 7:19am

physics
a roller whose diameter is 20 in weight 72 lbs. what horizontal force is necessary to pull the roller
Friday, October 12, 2012 at 7:16am

Physics
Help a constant force equal to (5i+2j)N moves a particle through a displacement S=(2i+3j). Calculate the workdone by the force. At what angle to the horizontal was the force applied?
Friday, October 12, 2012 at 1:05am

Physics
A uniform meter stick balances on a fulcrum placed at the 40 cm mark when a weight W is placed at 30 cm mark. What is the weight of the meter stick? How to calculator it ?
Friday, October 12, 2012 at 12:53am

Physics
A uniform meter stick balances on a fulcrum placed at the 40 cm mark when a weight W is placed at 30 cm mark. What is the weight of the meter stick? How to calculator it ?
Friday, October 12, 2012 at 12:53am

physics
Children in a tree house lift a small dog in a basket 4.90m up to their house. If it takes 201J of work to do this, what is the combined mass of the dog and basket?
Friday, October 12, 2012 at 12:15am

physics
A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 12.0 N force directed 25.0° below the horizontal. (a) Determine the work done by the applied force. J (b) Determine the work done by the normal force exerted by the table. J (c) ...
Friday, October 12, 2012 at 12:10am

physics
A 650-kg elevator starts from rest and moves upward for 2.80 s with constant acceleration until it reaches its cruising speed, 1.64 m/s. (a) What is the average power of the elevator motor during this period? W (b) How does this amount of power compare with its power during an...
Friday, October 12, 2012 at 12:09am

physics
A skier of mass 74 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 90 m up a 30° slope (assumed frictionless) at a constant speed of 3.0 m/s? J (b) What power (expressed in hp) must a motor have to perform this task? hp
Friday, October 12, 2012 at 12:09am

physics
A skier starts from rest at the top of a hill that is inclined at 9.5° with respect to the horizontal. The hillside is 225 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient of friction ...
Friday, October 12, 2012 at 12:08am

physics
A 2.1 103-kg car starts from rest at the top of a 5.9-m-long driveway that is inclined at 19° with the horizontal. If an average friction force of 4.0 103 N impedes the motion, find the speed of the car at the bottom of the driveway. m/s
Friday, October 12, 2012 at 12:07am

physics
If a force gives a 2-kg object an acceleration of 1.6 m/s2, what acceleration does this same force give to an 8-kg object?
Friday, October 12, 2012 at 12:06am

physics
A 52-kg pole vaulter running at 12 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.
Friday, October 12, 2012 at 12:01am

physics
A daring stunt woman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 12.5 m/s, and the woman is initially 1.31 m above the level of the saddle. How long is she in the air? The acceleration of gravity is...
Thursday, October 11, 2012 at 11:13pm

physics
A rocket moves upward, starting from rest with an acceleration of 32.0 m/s2 for 3.27 s. It runs out of fuel at the end of the 3.27 s but does not stop. How high does it rise above the ground?
Thursday, October 11, 2012 at 10:51pm

Physics. PLEASE HELP!
two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of magnitude F is applied to the block of mass m1. if P is the magnitude of the contact force between the blocks, what are the net forces acting on m1 ...
Thursday, October 11, 2012 at 10:48pm

Physics
A 21.3-g bullet is fired from a rifle. It takes 3.77 × 10-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 779 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet.
Thursday, October 11, 2012 at 10:47pm

Physics
Angel Falls in southeastern Venezuela is the highest uninterrupted waterfall in the world, dropping 979 m (3212 ft). Assume that it takes 14 s for the water to fall from the lip of the falls to the river below. If the water lands 60 m from the base of the vertical cliff, what ...
Thursday, October 11, 2012 at 10:26pm

physics
The bunny is initially hopping east at 7 m/s when it first sees the fox. Over the next half second the bunny changes its velocity to west at 12 m/s and escapes. What was the bunny's average acceleration (magnitude and direction) during this half-second interval?
Thursday, October 11, 2012 at 10:25pm

physics
Suppose that a senior driving a Pontiac zooms out of a darkened tunnel at 39.4 m/s. She is momentarily blinded by the sunshine. When she recovers, she sees that she is fast overtaking a camper ahead in her lane moving at the slower speed of 12.9 m/s. She hits the brakes as ...
Thursday, October 11, 2012 at 10:25pm

physics
You drop a ball from a height of 1.9m , and it bounces back to a height of 1.3m . a)What fraction of its initial energy is lost during the bounce? b)What is the ball's speed just before the bounce?
Thursday, October 11, 2012 at 9:36pm

Physics
A swimmer can swim in still water at a speed of 9.31 m/s. He intends to swim directly across a river that has a downstream current of 4.35 m/s. a) How many degrees from straight across the river should he head? Let upstream be a positive angle. Answer in units of degrees b) ...
Thursday, October 11, 2012 at 9:15pm

physics
determine the tension in each cable below. draw a force diagram for the system before solving the problem. Case A- ball suspended on one cable Case B- ball suspended on by two cables
Thursday, October 11, 2012 at 8:40pm

physics
A 5.84kg box sits on a ramp that is inclined at 35.2degrees above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.27. What horizontal force is required to move the box up the incline with a constant acceleration of 4.30m/s square
Thursday, October 11, 2012 at 8:32pm

physics
block A (mass 2.04kg) rests on a tabletop. It is connected by a horizontal cord passing over a light, frictionless pulley to a hanging block B (mass 3.00kg ). The coefficient of kinetic friction between block A and the tabletop is 0.215. After the blocks are released from ...
Thursday, October 11, 2012 at 8:27pm

physics
A 800. kg car starts from rest and accelerates uniformly to 19.0 m/s in 22.0 s. Assume that air resistance remains constant at 340 N during this time. Find (b) the average power developed by the engine
Thursday, October 11, 2012 at 8:27pm

physics
help! Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges.
Thursday, October 11, 2012 at 8:14pm

physics
trying to study but stuck with this one. Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 4.62 x 10-6 kg. The gravitational force that each sphere exerts on the other is balanced by the electric force. Determine the charge...
Thursday, October 11, 2012 at 8:14pm

physics
please help :/ Three charges are fixed to an xy coordinate system. A charge of +25C is on the y axis at y = +2.7 m. A charge of -16C is at the origin. Lastly, a charge of +66C is on the x axis at x = +2.7 m. Determine (a) the magnitude and (b) direction of the net ...
Thursday, October 11, 2012 at 8:11pm

Physics
a 96 kg clock initially at rest on a horizontal floor requires a 605 N horizontal force to set it in motion. After the clock is in motion a horizontal force of 547 N keeps it moving with a constant velocity. the acceleration of gravity is 9.81 m/s2 find the static friction ...
Thursday, October 11, 2012 at 8:09pm

physics
derive the formula v0=sqrt((deltaX)squared)*g)/2*deltaY
Thursday, October 11, 2012 at 8:02pm

Physics
You will fire the spring gun 3 times from the first detent and measure the change in height of the (pendulum + ball) for each shot. Write the equation for the change in height of the first shot.
Thursday, October 11, 2012 at 7:51pm

physics
A science student is riding on a flatcar of a train traveling along a straight, horizontal track at a constant speed of 12.8 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 67.0° with the horizontal and to be in line with...
Thursday, October 11, 2012 at 7:20pm

physics
A 5.84 box sits on a ramp that is inclined at 35.2 above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.27. What horizontal force is required to move the box up the incline with a constant acceleration of 4.30 ?
Thursday, October 11, 2012 at 7:14pm

physics
This is the situation I have been given: You are given three capacitors, one with a capacitance of 0.025 micro-farads, another with a capacitance of 0.05 micro farads, and the third with a capacitance of 0.015 micro-farads. Using only these capacitors, arranged in series, ...
Thursday, October 11, 2012 at 7:04pm

Physics
Two cars pass each other traveling at the same speed. One car has a constant velocity of 18.0 m/s east. The other car has a constant acceleration of 3.00 m/s^2, west. How much time will have elapsed until the cars are 128 m apart?
Thursday, October 11, 2012 at 5:55pm

Physics
An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
Thursday, October 11, 2012 at 4:57pm

Physics
An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.
Thursday, October 11, 2012 at 4:53pm

Physics
Identify the causes of conductive and sensorineural hearing loss. I have no idea. Please help.
Thursday, October 11, 2012 at 4:44pm

Physics
How does the cochlea sense sound? •Snail shaped tube lined with receptor cells which transmits signals to the brain. Correct?
Thursday, October 11, 2012 at 4:43pm

physics
a ramp is 2.8 m long and 1.2 m high. how much power is needed to push a box up a ramp in 4.6 s with a force of 96 N?
Thursday, October 11, 2012 at 4:28pm

Physics
A 63 kg student is standing atop a spring in an elevator that is accelerating upward at 2.5 m/s^2 . The spring constant is 2700 N/m. By how much is the spring compressed?
Thursday, October 11, 2012 at 3:06pm

physics
An airplane of mass 1.6 x 10^4 kg is moving at 58 m/s. The pilot then revs up the engine so that the forward thrust by the air around the propeller becomes 7.0 x 10^4 N. If the force exerted by air resistance on the body of the airplane has a magnitude of 6.0 x 10^4 N, find ...
Thursday, October 11, 2012 at 2:07pm

physics
A 0.70 kg block along a horizontal track has a speed of 1.10 m/s immediately before colliding with a light spring of force constant 3.50 N/m located at the end of the track. (a) What is the spring’s maximum compression if the track is frictionless?
Thursday, October 11, 2012 at 1:06pm

Physics
Mathematically determine the resultant force if two forces A and B act on an object. Force A is 85N and is at an angle of 20• to the horizontal. Force B is 125N and is at an angle of 60• to the horizontal.
Thursday, October 11, 2012 at 1:05pm

physics
A 800. kg car starts from rest and accelerates uniformly to 19.0 m/s in 22.0 s. Assume that air resistance remains constant at 340 N during this time. Find (a) the net force on the car
Thursday, October 11, 2012 at 1:00pm

physics
Prove that for an earth satellite,the ratio of its velocity at apogee to its velocity at perigee is the inverse ratio of its distances from apogee and perigee.
Thursday, October 11, 2012 at 12:31pm

physics
The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?
Thursday, October 11, 2012 at 12:30pm

PHYSICS
A factory worker pushes a 30.7 crate a distance of 4.0 along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. What magnitude of force must the worker apply to...
Thursday, October 11, 2012 at 11:35am

physics
arthur is riding a horse at a velocity of 4m/s.four seconds after,he is already traviling at a valocity of 12m/s. what is his acceleration?
Thursday, October 11, 2012 at 9:46am

Physics
A 67-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 840 N. What is the acceleration of the elevator?
Thursday, October 11, 2012 at 1:43am

Physics
A 60kg skier starts from rest at a height of 20m above the end of a ski-jump and leaves the ramp at an angle of 28 degrees. Neglet air resistance and assume the ramp is frictionless. A) What is the max height (h) of his jump above the end of the ramp B)If he increased his ...
Thursday, October 11, 2012 at 12:22am

College physics - Center of mass
College Physics- Center of Mass? The objects in the figure below are constructed of uniform wire bent into the shapes shown (Figure 1) . Each peice has a length of 0.15 . There are two objects that we need to figure out the x- and y-coordinates of the center of mass of the ...
Wednesday, October 10, 2012 at 11:39pm

College Physics
College Physics- Inertia? Find the moment of inertia about each of the following axes for a rod that is 0.300 in diameter and 1.60 long, with a mass of 5.00×10−2 . How do you find this ? I know how to find the perpendicular and end . but this? About an axis along ...
Wednesday, October 10, 2012 at 11:39pm

physics
A fox is chasing a bunny. The bunny is initially hopping east at 7 m/s when it first sees the fox. Over the next half second the bunny changes its velocity to west at 12 m/s and escapes. What was the bunny's average acceleration (magnitude and direction) during this half-...
Wednesday, October 10, 2012 at 11:37pm

physics
Bob heads out into a lake at an angle of 30 with respect to the shore. If his boat is capable of a speed of 3.3 m/s, how far from land will he be in 9 min and 46 s ? Answer in units of m
Wednesday, October 10, 2012 at 11:31pm

physics
Tarzan swings on a 34.0-m-long vine initially inclined at an angle of 33.0° with the vertical. (a) What is his speed at the bottom of the swing if he starts from rest? m/s (b) What is his speed at the bottom of the swing if he pushes off with a speed of 5.00 m/s? m/s
Wednesday, October 10, 2012 at 11:25pm

physics
A 7.80-g bullet moving at 520 m/s penetrates a tree trunk to a depth of 4.60 cm. (a) Use work and energy considerations to find the average frictional force that stops the bullet. N (b) Assuming the frictional force is constant, determine how much time elapses between the ...
Wednesday, October 10, 2012 at 11:24pm

physics
A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 12.0 N force directed 25.0° below the horizontal. (a) Determine the work done by the applied force. J (b) Determine the work done by the normal force exerted by the table. J (c) ...
Wednesday, October 10, 2012 at 11:24pm

physics
A sled loaded with bricks has a total mass of 23.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 12.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.350...
Wednesday, October 10, 2012 at 9:52pm

physics
The maximum speed of a child on a swing is 4.90 m/s. The child's height above the ground is 0.525 m at the lowest point in his motion. How high above the ground is he at his highest point?
Wednesday, October 10, 2012 at 9:47pm

College Physics
A 0.35 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 20° with the horizontal. Determine the speed of the stone. I've tried tan 20= gr/v^2 = (9.8)(.8)/v^2 = 4.7 m/s and that's not the correct answer (online ...
Wednesday, October 10, 2012 at 9:40pm

physics
A car slows down from 40 km/hr to rest in a distance of 72 m. What was its acceleration
Wednesday, October 10, 2012 at 9:23pm

physics
A spring gun (k = 27.1 N/m) is used to shoot a 51.1-g ball horizontally. Initially the spring is compressed by 16.5 cm. The ball loses contact with the spring and leaves the gun when the spring is still compressed by 11.5 cm. What is the speed of the ball when it hits the ...
Wednesday, October 10, 2012 at 9:17pm

physics
A 48.4 N child is in a swing that is attached to ropes 1.24 m long. Find the gravitational potential energy associated with the child relative to her lowest position when (a) the ropes are horizontal
Wednesday, October 10, 2012 at 8:58pm

physics
if a football kicked at ground level at 24.4 m/s at a 24 degree angle from horizontal. how long does it take for the football to hit the ground
Wednesday, October 10, 2012 at 8:58pm

physics
The rubidium isotope 87Rb is a β emitter that has a half-life of 4.9 x 1010 y that decays into 87Sr. It is used to determine the age of rocks and fossils. Rocks containing the fossils of early animal have a ratio of 87Sr to 87Rb of 0.004. Assuming that there was no 87Sr ...
Wednesday, October 10, 2012 at 8:40pm

physics
A 8.80 kg bowling ball moves at 1.80 m/s. How fast must a 2.45 g Ping- Pong ball move so that the two balls have the same kinetic energy
Wednesday, October 10, 2012 at 8:24pm

Physics
A conical pendulum is formed by attaching a ball of mass m to a string of length L, then allowing the ball to move in a horizontal circle of radius r. 1. Find an expression for the tension T in the string. (Express your answer in terms of the variables L, m, r and appropriate ...
Wednesday, October 10, 2012 at 8:20pm

physics
On a playground slide, a child has potential energy that decreases by 1000 J while her kinetic energy increases by only 900 J. How much energy is missing and where did it go?
Wednesday, October 10, 2012 at 8:05pm

Physics
Two boys of the same mass, 45 kg, are on a playground merry-go-round that has a diameter of 4.0 meters. Both boys are at the very edge of the ride. One boy stands with the coefficient of friction between his shoes and eh ride being .45 whereas the other is on his knees with a ...
Wednesday, October 10, 2012 at 8:02pm

physics
An object has an x-momentum of 8.5 kilogram·meters/second and a y-momentum of 9.8 kilogram·meters/second. What is resultant momentum of the object?
Wednesday, October 10, 2012 at 7:22pm

physics
A small ball of mass 2.00 kilograms is moving at a velocity 1.50 meters/second. It hits a larger, stationary ball of mass 5.00 kilograms. What is the kinetic energy of the system after the collision if the collision is elastic?
Wednesday, October 10, 2012 at 7:09pm

physics
A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 30.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.260...
Wednesday, October 10, 2012 at 7:03pm

Physics
Two students are on a balcony 22.3 m above the street. One student throws a ball, b1, vertically downward at 19.2 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed. The second ball just misses the balcony on the way down. (a) ...
Wednesday, October 10, 2012 at 6:51pm

Physics
Two railroad freight cars with masses 110 Mg and 170Mg approach with equal speeds of 0.330 . They collide, the lighter car rebounding opposite its original direction at 0.270 m/s. Find the velocity of the heavier car after the collision. Assume the original direction of the ...
Wednesday, October 10, 2012 at 6:44pm

Physics
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.10 m. Two of the spheres have a mass of 3.20 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...
Wednesday, October 10, 2012 at 3:38pm

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

physics
f M and m are particles connected by light inextensible string. M is held at center and rotated about horizontal axis as M is in equilibrium.What is torque ABOUT ITS CENTER
Wednesday, October 10, 2012 at 2:51pm

Physics
Two masses m are attached to two vertices of an equilateral triangle made of three massless rods of length l. A pivot is located at the third vertex, and the triangle is free to swing back and forth in a vertical plane. If it is initially released from rest when one of the ...
Wednesday, October 10, 2012 at 2:40pm

Physics,Question ,Solved but about Units?
These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total distance covered...
Wednesday, October 10, 2012 at 2:36pm

Physics
In tests on earth a lunar surface exploration vehicle (mass = 5.90 103 kg) achieves a forward acceleration of 0.215 m/s2. To achieve this same acceleration on the moon, the vehicle's engines must produce a drive force of 1.64 103 N. What is the magnitude of the frictional ...
Wednesday, October 10, 2012 at 2:11pm

physics
An 800 N gorilla swings from vine to vine. As the gorilla grabs a new vine, both vines form an angle of 30o with the vertical. What is the net force on each vine?
Wednesday, October 10, 2012 at 2:00pm

Physics
These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total distance covered...
Wednesday, October 10, 2012 at 1:59pm

Physics
Show that the average speed of a rabbit that runs a distance of 30 m in a time of 2 s is 15 m/s. I have a whole bunch of problems such as these and i'm not sure what math formula to use to figure problem.I know its Acceleration ! change of velocity time interval ! "v...
Wednesday, October 10, 2012 at 1:19pm

Physics- Elena please help!
A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.510...
Wednesday, October 10, 2012 at 12:47pm

physics
Find moment of inertia of a disc?
Wednesday, October 10, 2012 at 12:41pm

physics
If the distance x is 131 meters and the red car is traveling at 7.1 mph, how fast to the nearest hundreth is the blue car traveling?
Wednesday, October 10, 2012 at 10:29am

physics
5 usage for electricity.(in points)
Wednesday, October 10, 2012 at 10:03am

physics 101
50kg drops from a height of 2meters straight down with a force constant of 8 x 1000n/m. What maximum distance does she compress?
Wednesday, October 10, 2012 at 9:28am

Physics
Assume a perfectly elastic collision between a 916g bat and a 145g baseball. Initially, the ball was moving at 32 m/s toward the ball and afterward it's heading away at 40 m/s. Find bat's speed before and after collision.
Wednesday, October 10, 2012 at 1:24am

physics
how much weight ca lift aperson in moon who can lift 50kg in moon -how to solve it
Wednesday, October 10, 2012 at 1:24am

Physics- Help! Due soon!
Two packing crates of masses m1 = 10.0 kg and m2 = 5.00 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 5.00 kg crate lies on a smooth incline of angle 40.0°. Find the acceleration of the 5.00 kg crate. Find the tension...
Wednesday, October 10, 2012 at 12:08am

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

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