Two identical bicycles move at different speeds. The faster bicycle has three times the speed and therefore has

The first scientist to introduce the concept of inertia was

Due to inertia, perhaps a railroad train in motion should continue moving indefinitely when its engine is turned off. This is not observed because railroad trains

An object has gravitational potential energy due to its

If you quickly run away from the orchestra at a concert, the frequency of the sound you hear will be

A low frequency sound source produces a low

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