Physicsmedium · Past Paper
A car starts from rest and reaches a speed of 20 m/s in 5 seconds. If its mass is 1000 kg, the net force is:
A4000 N
B5000 N
C200 N
D400 N
✓ Correct Answer: A — 4000 N
Acceleration a = (v-u)/t = (20-0)/5 = 4 m/s². Force F = ma = 1000 * 4 = 4000 N.
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