An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s....
PHYSICS
WAEC 2007
An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s. Calculate the change in the speed of the particle
- A. 50ms-1
- B. 25ms-1
- C. 20ms-1
- D. 5ms-1
Correct Answer: C. 20ms-1
Explanation
a = \(\frac{F}{m} = \frac{100}{0.15} = 666.7\)
v = u + at
= 0 + 66.7 x 0.03
= 20m/s2
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