A constant force acting on a body of mass 5 kg changes its speed from 2 m/s to 7 m/s in 10 s the direction of motion of the body remains unchanged. Find the magnitude of the force.
Correct answer: C. 2.5 N
- A. 0.5 N
- B. 1.5 N
- C. 2.5 N
- D. 3.5 N
Explanation
F = m (v - u) / t = 5 (7 -2) / 10 = 2.5 N .
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