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Suppose a bouncy ball were thrown against a wall. The ball hit with 15 m/s and then bounced backwards with 15 m/s. The interaction time with the wall was 0.5 ms. If the ball's mass is 0.1 kg, what is the average force of the wall on the ball?
express the magnitude of the applied horizontal force.
A 1200 turn coil in a dc motor has an area per turn of 2.2 * 10-2m-2. What is the current in the coil
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.6 kg· m2 and an angular velocity of +7.6 rad/s. Disk B is rotating with an angular velocity of -10.8 rad/s.
An artillery shell of mass 10.00 kg, lying at rest on the ground, accidentally detonates, exploding into three pieces of shrapnel. Calculate the speed of the third piece of shrapnel
A weightlifter "snatches" a 1200 N weight by exerting a 1400 N average force for the first meter off the ground, then relaxing his grip and "getting under" the bar to catch it and give it a final upward push. What velocity will the weight attain af..
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular paths
Place a friction block fuzzy side down on a track and add some mass on top to give it extra traction. Pull the block VERY SLOWLY with a spring scale, starting with very little effort but continuously increasing your effort over a few seconds until..
the velocity of a diver just before hitting the water is -9.6 ms where the minus sign indicates that her motion is
A horizontal force of 200N is applied to a 55kg cart by a child across a 10m level surface. The cart accelerates at 2m/s^2. What force of friction acts to retard the motion of the cart
typical household currents are on the order of a few amperes.a. if a 1.64 a current flows through the leads of an
A motor rotating a gringing wheel which is 5m in radius, isrotating at 60 rev/min. What is the initial speed of the wheel
monatomic molecules adsorbed on a surface are free to move on this surface and can be treated as a classical ideal two
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