Blog

A melon is projected into the air with 100 J of kinetic energy in the presence of air resistance. When it returns to its initial level its kinetic energy is

Each of us weighs slightly less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the

A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange will the bullet be 1 s later?

An archer shoots an arrow. If the action force is the bowstring on the arrow, the reaction is the

A heavy rock and a light rock in free fall have the same acceleration because the

A boat loaded with a barrel of water floats in a swimming pool. When the barrel of water is poured overboard, the pool level

A vase sits at rest on a table. If the action force is Earth pulling downward on the vase, the reaction force is the

From Earth, one satellite appears to overtake another. The faster satellite that is seen to overtake the other is

An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will move in the opposite direction at

A boat loaded with scrap iron floats in a swimming pool. When the iron is thrown overboard, the pool level will