while working out a man performed 2525j of work in 19seconds . what was his power A:132.9w. B:241.5w C 47.975w. D100.5w
2 answers:
Answer:
Power of the man is 132.9 W.
Explanation:
Given that,
Work performed by the man is 2525 J
Time for which the work is performed is 19 second
To find :
Power of the man
Solve :
Let P is the power of the man. The total work done divided by time taken is called the power of an object. Its formula is given by :
or
Therefore, the power of the man is 132.9 W.
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The centripetal acceleration a is 4.32 10^-4 m/s^2.
<u>Explanation:</u>
The speed is constant and computing the speed from the distance and time for one full lap.
Given, distance = 400 mm = 0.4 m, Time = 100 s.
Computing the v = 0.4 m / 100 s
v = 4 10^-3 m/s.
radius of the circular end r = 37 mm = 0.037 m.
centripetal acceleration a = v^2 / r
= (4 10^-3)^2 / 0.037
a = 4.32 10^-4 m/s^2.