Question

A 1230 kg unmanned space probe is moving in a straight line at a constant speed of 223 m/s. Control rockets on the space probe execute a burn in which a thrust of 3520 N acts for 70.4 s. (a) What is the change in the magnitude of the probe's linear momentum if the thrust is directed in the forward direction, so as to slow the probe? (b) What is the change in kinetic energy under the same condition? Assume that the mass of the ejected burn products is negligible compared to the mass of the space probe. (a) Number 247808 Units kg.m/s or Nos (b) Number Units

Answer 1

mu- . 274 290 km Initial momentum (1230x 223)kgm/s = legmals Impulse= (fxt) = (3520x 70.4) kgm/s = 297808 kgils directed (a) As thrust is in the forward direction therefore impulse will act in backward direction 247808 kgm/s as we know Impulse = change in linear momentum change in linear momen omentum legals n. So 247808 of Nos

(5) - Pitap म 26482 final linear mom nomentum (274290 – 247808) kgm/s kgm/s Change in kinetic energy- - Pi myr mur 2 2 am 2m (eint fy") z am 11 2m (26482) ²_ (274 J 2X1230 AKE = - 30034107 J