A 255 N force is applied to a 46 kg box that is located on a flat horizontal surface. The coefficient of kinetic friction between the box and the surface is 0.3

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

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.