A man pulls a block with a force of 300N through 50m in 60s. Find the power used by him to pull the block
Answers
Answer:
The power used by him to pull the block is 250 W.
Explanation:
Given Parameters:
The force with which the man pulls the block (F) = 300N
Distance Covered (s) = 50 m
Time taken to cover the distance (t) = 60 s.
Now, we will calculate the velocity of the block.
The time rate change of displacement is known as velocity.
That is, Velocity = Displacement /Time
So, we enter the values in the formula, and we have
Velocity (v) = 50/60 = 5/6 m/s
Now, the formula for power is given by
Power = Force × Velocity.
Again, we enter the values in the formula, and we have
Power = 300 × (5/6) = 250 W
Therefore, the power used by him to pull the block is 250 W,
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The man used 250 Watts of power to pull the block.
The power used by a person to pull a block can be calculated using the formula:
Power = Work done / Time taken
Work done is calculated as follows:
Work = Force x Distance
In this case, the man pulled a block with a force of 300 N through a distance of 50 m.
So, Work = 300 N x 50 m = 15,000 J (joules)
The time taken to pull the block was 60 seconds.
Putting the values in the formula:
Power = Work done / Time taken
= 15,000 J / 60 s
= 250 Watts
It is important to note that the unit of power is Watts, which is defined as Joules per second. In this case, the man used 250 Joules of energy in 60 seconds, which is equal to 250 Watts.
In conclusion, the power used by a person to do work can be calculated by dividing the work done by the time taken to do that work. In this case, the man used 250 Watts of power to pull the block through 50 meters in 60 seconds.
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