Some baseball pitchers are capable of throwing a fast ball at 100 mi/hr. The pitcher achieves his speed by moving his arm through a distance of 1.5 m. Determine the average net force that must be exerted on the 0.15 kg ball during the pitch. (1 mile

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?