Compared to yesterday, you did three times the work in one-third the time. To do so, your power output must have been a. the same as yesterdays power output
b. one-third yesterdays power output
c. three times yesterdays power output
d. nine times yesterdays power output

D. nine times yesterdays power output

Explanation:

We know that formula for power with work is;

Power = workdone/time taken

Now, you did three times the work in one-third the time yesterday.

This means that;

Work yesterday; W_yesterday = W

Work today; W_today = 3W

Time yesterday; T_yesterday = t

Time today; T_today = t/3

Thus,power today is;

P_today = 3W/(t/3)

P_today = 9(W/t)

Since power output yesterday is W/t, it means you did nine times yesterday's power output.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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