An object whose mass is 100 g starts from rest and moves with constant acceleration of 20 cm/s2. At the end of 8 s its momentum is _ in g cm/s.
Correct answer: C. 16000
- A. 500
- B. 8000
- C. 16000
- D. 33000
- E. 64000
Explanation
mass = 100gram = 0.1kg initial velocity (u) = 0 acceleration (a) =20cm per second square =0.2 metre per second square.Time=8 second Final velocity =? According to the equation v=u+at v=0+0.2 * 8 =1.6m/s Momentum = mass * velocity =0.1 * 1.6 =0.16 kg m/second =16000 gram cm/second
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