A body of mass 10 kg moving with a velocity of 1 m/s is acted upon by a force of 50 N for two seconds. The final velocity of the body is
- A. 22 m/sec
- B. 1 m/sec
- C. 21 m/sec
- D. 11 m/sec
Answer: D. 11 m/sec
Explanation: $v = u + at$. $a = F/m = 50/10 = 5$. $v = 1 + 5(2) = 11$ m/s.