PLEASE HELP. 1. A baseball pitcher throws a fastball at a speed of 50.0 m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it through an almost straight-line distance of 4.2 m. Calculate the acceleration,
assuming it is uniform. Compare this acceleration to the acceleration due to gravity, 9.8 m/s?

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

Aballet student who learns with the of his instructor is demonstrating learning.