Calculate the power expended when a 20 N force pushes a cart 3.5 m in a time of 0.5s .
The power expended.
Answer to Problem 4PC
The power expended is 140 watt .
Explanation of Solution
Given info: The force is 20 N , the distance is 3.5m and the time interval is 0.5 s .
Write the expression for the work done.
Here,
F is the force
d is the distance
Substitute 20 N for F and 3.5 m for d in the above equation to get w .
Write the expression for the power.
Here,
W is the work done
t is the time interval
Substitute 70 J for W and 0.5 s for t in the above equation to get
Conclusion:
Therefore, the power is 140 watt .
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