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A spring with a relaxed length of 25 cm and a stiffness of12N/m stands vertically on a table. A block of mass 76g is attached to the top of the spring. You pull the block upward, stretching the spring until its length is now28.7cm,hold the block at rest for a moment, and then release it. Using a time step of 0.1 s,predict the position and momentum of the block at a time0.2 s after you release the block. (Assume the +y direction is upward. Express your answers in vector form.)
question a sprinter starts from rest and accelerates to her maximum speed of 9.5 ms in a distance of 9.3 m.a what was
1. A 10-kg body is observed to have an acceleration of 5 m/s². What is the net force acting on it? A force of 80N gives an object of unknown mass an acceleration of 20 m/s². What is its mass?
A flywheel of mass 185 kg has an effective radius of 0.63 m. What is the applied torque on the flywheel
An ideal gas has a temperature of 850 K. calculate the total kinetic energy of 1 mol of this gas
A small piece of Styrofoam packing material is dropped from a height of 1.50 m above the ground. Until it reaches terminal speed, magnitude of its acceleration is given by a = g - bv. After falling 0.40 m, the styrofoam effectively reaches its ter..
A diver pushes off horizontally from the top of a vertical cliff that is 40.0 m high from water surface below. How long is the diver in the air
two identical objects are placed in a room at 24deg c. object 1 has a temperature of 95deg c and object 2 has a
A 51.1 kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. what is the spring constant of the bungee cord
A 4-kg rock is tied to the end of a string and twirled overhead, 1.7 m above the ground, in a 1.1-m radius, horizontal circle. How far away from its location when the string breaks will the rock hit the ground
in 1960, mrs maxwell rogers of tampa florida, reportedly raised one end of a car that had fallen onto her son when a jack failed. If her panic lift effectively raised 4000 N (about a quarter of the car's weight) by 5 cm, how much work did her forc..
On mountainous downhill roads, escape routes are sometimes placed to the side of the road for trucks whose brakes might fail. Calculate the horizontal and vertical components of the acceleration of a truck
A racquetball strikes a wall with a speed of 3 m/s and rebounds in the opposite direction with a speed of 26 m/s. The collision takes 20ms. What is the average acceleration of the ball through the collision with the wall?
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