Samuel pulls on a 15-kg sled with a constant horizontal force of 60 N. If there are no other horizontal forces, what is the wagon’s acceleration in ?

When sound travels faster near the ground than above, bending of sound tends to be

 A 5-kg box of books has 75 J of potential energy relative to the ground.  Its height above the ground is

A box of books lifted 10 meters gains 200 J of potential energy. If the same box of books is instead lifted 40 meters, its gain in potential energy is

An object’s weight is properly expressed in units of

 The distance traveled by a wave during a single period is

When a bullet is fired from a rifle, which undergoes the greater acceleration?

  A 500-kg car and a 2000-kg car are hoisted to the same height. Raising the more massive car requires

The work done in pushing a coffee table a distance of 3 m with an average force of 60 N is

The mass of a cow that weighs 1000 N is about