Physics for IGCSE & O level - Forces And Energy (Section 4 - No. 46)
What does the motor need to provide for a 700N force moving 50m in 10 sec to balance the total frictional forces?
350 J
3500 J
350 W
3500 W
Explanation
Work = force x distance = 700N * 50m = 35000 J and power = Work/time, P = 35000J/10s, P= 3500 W.
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