Question

PHYSICS 1300 QUIZ m9A-Fall 2016 Name g-9.80 m/s -32.2 ns' F, mg 1-i Fondi i- i, Asss N rocket sled is subjected to the net force shown. The sled starts with velociry s a) Find the impulse on the between t- 0 s and t-6.0s. b) Find the sled's speed at t a 60s. 900 539 700

Answer 1

Impulse = force times area under curve = 1/2 (2)(600)+600 (1)+1/2 (600)(3) = 600+600+900 = 2100 N.s Impulse = Delta P = m Delta V Delta = I/m = 2100/(580/9.8)kg = 2100/59.183 = 35.48 m/sec. V_f -V_i = 35.48 V_f -15 = 35.48 V_f = 35.48+15 = 50.48 m/sec.