Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball?
a. so you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force.
b. so you can pull your hand back, increasing the time to slow the ball thus increasing the force.
c. so you can catch the ball with a stiff arm increasing the time to slow the ball thus increasing the force.
d. so you can pull your hand back, increasing the time to slow the ball thus deceasing the force.

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?