Meg lifted a box of books with a mass of 20 kg from the floor to a shelf 1.4 m off the ground. the applied force was equal to the weight of the box of books. how much work did meg do?

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

Work = force × a. work b. energy c. distance d. momentum

What is the measure of a change in an objects velocity?