A small satellite is in elliptical orbit around Earth as shown. If L denotes the

Question

A small satellite is in elliptical orbit around Earth as shown. If L denotes the magnitude of angular momentum and K denotes kinetic energy: L2 > L1 and K2 > K1 L2 > L1 and K2 = K1 L2 > L1 and K2 = K1 An unstable nucleus has mass M and is initially at rest. It ejects a partice The recoil speed of the remaining nucleus is: v mv/M mv/(m+M) (m+M)v/m mv/(M-m) A 75-kg man is riding in a 30-kg cart at 2.0 m/s. He jumps off m such a way as to land ground with no horizontal velocity. The resulting speed of the cart is: zero 2.0 m/s 3.0 m/s 5.0 m/s 7.0 m/s A 40-kg object is acted upon by a single force in the x direction in a manner described by the graph shown. The momentum acquired by the object is: 16N-s 30 N -s 32N-s 40N-s 48N-s A phonograph turntable, rotating at 0.75 rev/s, slows down and stops in 60 s. The magnitude of its average angular acceleration in rad/s2 for this process is: 1.5 1.5pi pi/40 pi/20 0.75

Explanation / Answer

16   E

17 B

18 D

19 C

20 c

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