If the change in kinetic energy of a tennis ball hit by the racket is 29), and the average force that the racket exerts on the ball
is 80. N, what is the distance that the force is exerted over?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

What is a subatomic particle with a negative charge and very little mass?