Physics: Concepts and Connections, 4 th ed., Art Hobson Ch. 6 – Conservation of Energy

A 1-kg book is lifted to a height of 10 m. How much work is done on the book? A) None B) 1 J C) 10 J D) 100 J E) 1000 J

A 10 kg meteor moves through outer space (where g = 0). How much work is done on the meteor as it moves a distance of 5 m ? A) None B) 2 J C) 20 J D) 50 J E) 500 J

What happens to the gravitational potential energy of a book when it is lifted up to a height of 1.0 m ? A) GravE increases B) GravE decreases C) GravE stays about the same

What happens to the gravitational potential energy of a satellite that is moved from an orbit that is 6000 km above the surface of the Earth to an orbit at an altitude of km? Note: R Earth = 6370 km A) GravE increases B) GravE decreases C) GravE stays about the same

What happens to the gravitational force acting on a satellite that is moved from an orbit that is 6000 km above the surface of the Earth to an orbit at an altitude of km? Note: R Earth = 6370 km A) The weight decreases by a factor of 4 B) The weight decreases by a factor of 2 C) The weight of the satellite stays the same

In the demonstration with balls rolling down three different tracks, which track results in the largest final speed? A) The “high road” (convex) B) The “middle road” (straight path) C) The “low road” (concave) D) The final speed is the same for all three.