A ball with a mass of 65 g flies with a velocity of 25 m/s. It is hit with a bat, whereby it gets a velocity of 35 m/s in the opposite direction. What is the average force that the bat acts on the ball with if the ball touches the bat for 4.0 ms?

Asystematic approach to problem solving is called a (an)

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.