You get into an elevator and step onto a bathroom scale, which shows you weigh 150 pounds. The doors close, and the elevator starts to move, very smoothly. You look down, and notice that your weight is now 155 pounds. What can you say about the motion of the elevator? (A) It is moving upward, but slowing down.
(B) It is moving downward, and speeding up.
(C) It is moving downward, but slowing down.
(D) It is moving upward, at a constant speed.

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the acceleration?

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

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?