Two objects, a sphere and a block of the same mass, are released from rest at the top of an inclined plane. The sphere rolls down the inclined plane without slipping. The block slides down the plane without friction. Which object reaches the bottom of the ramp first? A. The sphere, because it gains rotational kinetic energy, but the block does not B. The sphere, because it gains mechanical energy due to the torque exerted on it, but the block does not C. The block, because it does not lose mechanical energy due to friction, but the sphere does D. The block, because it does not gain rotational kinetic energy, but the sphere does

If point on a front wheel of the bicycle tire completes exactly eight turns, what can be said about the linear and angular acceleration of point . a. Only the angular displacement is zero. b. Only the linear displacement is zero. c. Neither is zero. d. Both are zero.

Cyclist! A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. After 14 s, the wheels have made 48 rev. What is the angular velocity of the wheels after 14 s in rad/s ? rad/s Submit Answer Tries 0/2 What is the angular acceleration of the wheels in rad/s2 ? rad/s2 Submit Answer Tries 0/2 If the radius of the wheel is 37 cm, and the wheel rolls without slipping, how far has the cyclist (in m) traveled in 14 s? m Submit Answer Tries 0/2

An ice skater is spinning on the ice with her arms fully extended. When she pulls in her arms, she spins at a faster rate because a. Her moment of inertia decreases. b. Her moment of inertia increases. c. Her moment of inertia stays the same. d. Her mass stays the same. e. Her weight stays the same.

An ice skater, whose rotational inertia is I = 4 kg·m2 with her arms close to her body, is spinning at 2 rad/s. She then fully extends her arms, changing her rotational inertia to 8 kg·m2. Which of the following is true? a.) Her angular momentum remains the same. b.) Her angular velocity decreases. c.) Her kinetic energy decreases. d.) All of the above. e.) B and C. d.) None of the above.

+, F. You use a wrench to turn a rusty nut. You place your hand at where the black dot is and apply a force F = 110N at an angle 0 = 59 degrees. The distance from your hand to the center of nut d = 30 cm. Calculate the torque in N. m your hand applies. %3D %3D %3D p. 0. MacBook Pro G Search or type URL

A solid disk, a circular hoop and a solid spherical ball (all made of the same material and with the same diameter) are released from rest and then roll down a slope. Which object reaches the bottom first? Select one: a. Solid spherical ball b. Solid disk c. Circular hoop d. None, they all reach the bottom at the same time

Two objects, a sphere and a block of the same mass, are released from rest at the top of an inclined plane. The sphere rolls down the inclined plane without slipping. The block slides down the plane without friction. Which object reaches the bottom of the ramp first? A. The sphere, because it gains rotational kinetic energy, but the block does notB. The sphere, because it gains mechanical energy due to the torque exerted on it, but the block does notC. The block, because it does not lose mechanical energy due to friction, but the sphere doesD. The block, because it does not gain rotational kinetic energy, but the sphere does

A tennis player swings a standard tennis racket that is 27 inches long at an angular velocity of 20 rad/s. If the tennis player changes to a junior tennis racket that is 23 inches long and swings with an angular velocity of 20 rad/s, what happens to the linear velocity of the tennis racket? A. Linear velocity decreases B. Linear velocity remains the same C. Need more information

4. A playground toy has four seats, each 5.0 kg, attached to very light, 1.5 m long rods, as seen from above in the figure. If two children with masses of 15 kg and 20 kg, sit in seats opposite one another, what is the moment of inertia about the rotation axis? 1.5 m

A mass hangs by a massless string that is wound around a solid circular pulley of radius 20 cm. There is no friction in the pulley. The block is released from rest, and the pulley goes through three complete rotations (6 t radians) in 4 seconds. 0.2 m What is the direction of the angular acceleration? A) Up B) Down C) Into the page D) Out of the page E) Unknown O A O B E.

Two objects, a sphere and a block of the same mass, are released from rest at the top of an inclined plane. The sphere rolls down the inclined plane without slipping. The block slides down the plane without friction. Which object reaches the bottom of the ramp first? A. The sphere, because it gains rotational kinetic energy, but the block does notB. The sphere, because it gains mechanical energy due to the torque exerted on it, but the block does notC. The block, because it does not lose mechanical energy due to friction, but the sphere doesD. The block, because it does not gain rotational kinetic energy, but the sphere does

6. A ball on a string has a moment of inertia of 14 kg · m2. It experiences a torque of 21 m N. a. What is the angular acceleration of the ball? b. The ball starts from rest. What angular velocity does it have after 3.5 seconds? c. What angular momentum does the ball have after 3.5 seconds?