A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. ignore frictiona
l losses and assume that the mass of the ball is distributed uniformly. the translational speed of the ball is 3.50 m/s at the bottom of the rise. find the translational speed at the top. cutnell, john
d.; johnson, kenneth w.; young, david; stadler, shane. physics, 10th edition (page 247). wiley. kindle edition.
d.; johnson, kenneth w.; young, david; stadler, shane. physics, 10th edition (page 247). wiley. kindle edition.
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Answer : The correct option is, (D) A machine does 400 joules of work in 5 seconds.
Explanation :
Power : It is defined a the rate of doing work per unit time.
Formula used :
where,
P = power
w = work done
t = time
Now we have to determine the rate of power for the following options.
(A) A machine does 200 joules of work in 10 seconds.
(B) A machine does 400 joules of work in 10 seconds.
(C) A machine does 200 joules of work in 5 seconds.
(D) A machine does 400 joules of work in 5 seconds.
From this we conclude that, a machine does 400 joules of work in 5 seconds has the highest rate of power.
Hence, the correct option is, (D)