KTBWA A rocket is launched and attains a speed of 4600.m/s when 77000.m above th

Question

KTBWA A rocket is launched and attains a speed of 4600.m/s when 77000.m above the surface of the Earth. If the engines then shut down, how much higher will the rocket rise before beginning its fall back toward the Earth? 10. a. 669600 m b. 1334000 m c. 1974000 m d. 1848000 m e. 1271000,m f. 2351000 m KTNDS A 34.g golf ball is at rest on a tee. A golfer swings his club and hits the ball so that the club applies an average force of 330 N for 4.1.ms. How fast does the ball move coming off the tee? d. 29.51 m/s e. 36.47 m/s f. 20.52 m/s a. 73.39 m/s b. 39.79.m/s c. 40.99.m/s IZIXM A toy train engine (2.5_kg) is moving 0.22 m/s to the right when it collides with a car (3.8.kg) moving 0.18.m/s in the opposite direction, and they stick together. Find the velocity of the engine- car combination as they move off together. Assume "to the right" is the positive direction. 12. -0.01455,m/s d. -0.02326 m/s a.

Explanation / Answer

solving 1st question

Let it go x m more higher

conserving energy

0.5*m*v^2-GMearth*m/(6371000+77000)=-GMearth*m/(6371000+77000+x)

we got x=1332519.8

So option (b) is correct

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