If the change in kinetic energy of a tennis ball hit by the racket is 29J, and the average force that the racket exerts on the ball
is 80. N, what is the distance that the force is exerted over?

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.