1 point Two elevators, A and B, move at constant speed. Elevator B moves with
twice the speed of elevator A. Elevator B weighs twice as much as elevator
A. Compared to the power needed to lift elevator A, the power needed to
lift elevator B is
twice as great
half as great
the same
O four times as great

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.