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A small block of mass 0.97 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R0 = 0.52 m with a speed 1.3 m/s. It is held in its path by a string that passes through a small hole at the center of the circle. The string is then pulled down a distance of 0.1 m.( R0 - Rf = 0.1 m. It is pulled so slowly that the object continues to move in a circle of continually decreasing radius.
1) What is the torque placed on the mass by the string??
2) What is the final speed of the block?
3) How much work was done by the force that pulled on the string?
A rookie quarterback throws a football with an initial upward velocity component of 15.33 and a horizontal velocity component of 20.4. Overlook air resistance.
You are lowering two boxes, one on the top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp.
A skier is gliding along at 3.6 m/s on horizontal, frictionless snow. He suddenly starts down a 10 degree incline. His speed at the bottom is 17 m/s. What is the length of the incline
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string under a tension of 50.5 N is used to whirl a rock in a horizontal circle of radius 2.55 m at a speed of 20.3 m/s on a frictionless surface, What is the breaking strength, in newtons, of the string
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A 60.0 kg pole vaulter running at 12.0 m/s vaults over the bar. Assume that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump?
A charged capacitor is connected to an inductor. At time t=0 the charge on the capacitor is Q= 6uC. What is the amplitude of the current at that same instant
Two passenger trains A and B, each 220 m long, pass a 50 m long railroad platform in Winnepeg. The trains are moving in opposite directions at equal speeds of 0.670c with respect to the ground, What is the difference in arrival times
A 46.0-kg girl is standing on a 159-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, What is the velocity of the plank relative to the ice surface
A block of mass M is at point A on the slope (the slope is just a %u201Cregular roller coaster ride %u201D, What is the velocity at the bottom of the slope at point B which is 5 meters below point A
Strictly speaking, as more and more skyscrapers are being built on surface of earth, does the day tend to become longer or shorter.
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