Author Question: A stone is moving on a rough level surface. It has 24 J of kinetic energy, and the friction force on ... (Read 28 times)

joblessjake · **on:** Jul 29, 2018

A stone is moving on a rough level surface. It has 24 J of kinetic energy, and the friction force on it is a constant 0.50 N. What is the maximum distance it can slide?

A) 2.0 m
B) 12 m
C) 24 m
D) 48 m

Question 2

Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. Rachel's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year).

According to Rachel, how long does the trip take? A) 14 years
B) 15 years
C) 11 years
D) 4.2 years
E) 23 years