A rock dropped from a 20 meter bridge falls into the river below. How long did it take to reach the water? What velocity did it
1 answer:
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Answer:
a. one-half as great
Explanation:
The power developed by the first lifter is one-half as great as that of the second person.
Power is defined as the rate at which work is done;
Power =
Since the two lifters do the same work at different time, let us estimate their power;
P₁ = P₂ =
We see that for P₁, power is half of the work done whereas in P₂ power is the same as the work done.
Therefore,
The power of the first weight lifter is one-half the second lifter.
Answer:
Explanation:
From the question we are told that:
Crane Length
Crane Mass
Arm extension at lifting end
Arm extension at counter weight end
Load
Generally the equation for Torque Balance is mathematically given by