Question

need help in finding Impulse I exerted

55. BASEBALL A batted baseball is subjected to a force whose direction is constant but whose magnitude is given by F(t) = -9,400,000(t? – 0.02t) (0 < t = 0.02) where F(t) is measured in newtons and t in seconds. The force acts only over the time interval [0, 0.02]. Find the impulse I exerted by the bat on the baseball where 0.02 I= - F(t) dt 0 N-sec. What is the average force acting on the baseball? F(t) dt Hint: Average force = b-a

Answer 1

0.02 - So FCE) dt 0.02 1) (t2 – 0.02t) dt. -9, 400, 000 1 0.02 -9,400,000 I - 9,400,000 [-0-02]. Let - 0.01€ 3002 (0.01) C0.02 -02)] - 9,400,000 3 1 (0.02) 10 3 -9,400,000 [ 0.000002667 - 000 0004 U T 12.5302 b force FCEldt S [12.5302 Aug (0-02-0) b-a 6265) 2