On a dry road, a car with good tires may be able to brake with a constant deceleration of 4.87 m/s2. (a) how long does such a car, initially traveling at 23.1 m/s, take to stop? (b) how far does it travel in this time?

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

What is the rate of change in a objects position?

How does the entropy of steam compare to the entropy of ice?