Q: A baseball has mass 0.145 kg. (a
A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of 45.0 m/s and the batted ball’s velocity is 55.0 m>s in the opposite direction, find the magnitude of the change i...
See AnswerQ: A 0.160-kg hockey puck is moving on an
A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t = 0, the puck is moving to the right at 3.00 m/s. (a) Calculate the velocity of the puck (magnitude and direction) af...
See AnswerQ: (a) What angle in radians is subtended by an arc
(a) What angle in radians is subtended by an arc 1.50 m long on the circumference of a circle of radius 2.50 m? What is this angle in degrees? (b) An arc 14.0 cm long on the circumference of a circle...
See AnswerQ: An electric fan is turned off, and its angular velocity decreases
An electric fan is turned off, and its angular velocity decreases uniformly from 500 rev/min to 200 rev/min in 4.00 s. (a) Find the angular acceleration in rev/s2 and the number of revolutions made by...
See AnswerQ: The rotating blade of a blender turns with constant angular acceleration 1
The rotating blade of a blender turns with constant angular acceleration 1.50 rad/s2. (a) How much time does it take to reach an angular velocity of 36.0 rad/s, starting from rest? (b) Through how man...
See AnswerQ: (a) Derive Eq. (9.12) by
(a) Derive Eq. (9.12) by combining Eqs. (9.7) and (9.11) to eliminate t. (b) The angular velocity of an airplane propeller increases from 12.0 rad/s to 16.0 rad/s while turning through 7.00 rad. What...
See AnswerQ: A radio-controlled model airplane has a momentum given by [(-
A radio-controlled model airplane has a momentum given by [(-0.75 kg. m/s3)t2 +(3.0 kg. m/s)]
See AnswerQ: A physics student of mass 43.0 kg is standing at
A physics student of mass 43.0 kg is standing at the edge of the flat roof of a building, 12.0 m above the sidewalk. An unfriendly dog is running across the roof toward her. Next to her is a large whe...
See AnswerQ: The pulley in Fig. P9.76 has radius 0.
The pulley in Fig. P9.76 has radius 0.160 m and moment of inertia 0.380 kg . m2. The rope does not slip on the pulley rim. Use energy methods to calculate the speed of the 4.00-kg block just before it...
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