Acar traveling at 45 m/s can brake to a stop within 10m. assume that the braking force is effective for stop and constant with speed. if the car speeds up to 90 m/s, what is its stopping distance? provide your explanation using principle of work and energy.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

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?

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential