Serena williams can serve a tennis ball with 750 newtons of force. the ball and racquet are in contact for 0.003 seconds. what is the impulse exerted on the tennis ball? impulse = f ∙ t question 5 options: 0.0004 n∙s 2.25 n∙s 250,000 n∙s now

2.25 Newton.seconds

Impulse is a rate of change of the momentum. It is calculated as a product of the average force over a time interval. Both measures are given here, so we can just apply the formula:

(impulse) = (avg. force) x (duration) = (750 N) x (0.003 s) = 2.25 N.s

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered