Physics Fundamentals
Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 5, Problem 38P
To determine

The displacement of the car with respect to earth.

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A 250-kg flatcar 23 m long is moving with a speed of 7.0 m/s along horizontal frictionless rails. A 95-kg worker starts walking from one end of the car to the other in the direction of motion, with a speed of 3.0 m/s with respect to the car. In the time it takes for him to reach the other end, how far has the flatcar moved?
A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.530 m/s. The total mass of the sled, man, and rock is 93.0 kg. The mass of the rock is 0.320 kg and the man can throw it with a speed of 16.5 m/s. Both speeds are relative to the ground. Determine the speed of the sled (in m/s) if the man throws the rock forward (i.e., in the direction the sled is moving). m/s Determine the speed of the sled (in m/s) if the man throws the rock directly backward. m/s
A man holding a rock sits on a sled that is sliding across a frozen lake (negligible friction) with a speed of 0.530 m/s. The total mass of the sled, man, and rock is 94.5 kg. The mass of the rock is 0.250 kg and the man can throw it with a speed of 14.5 m/s. Both speeds are relative to the ground. Determine the speed of the sled (in m/s) if the man throws the rock forward (i.e., in the direction the sled is moving).   m/s Determine the speed of the sled (in m/s) if the man throws the rock directly backward.
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