The work required to move a box a particular distance is 300 J. How much power is required to move the box in 3 seconds?
1 answer:
Given:
Work = 300 Joule
time = 3 second
To find:
Power required to move a box = ?
Formula used:
P =
Where P = power required to move box
W = work done to move the box
t = time taken to move the box
Solution:
Power required to move the box is given by,
P =
Where P = power required to move box
W = work done to move the box
t = time taken to move the box
P =
P = 100 Watt
Thus, Power required to move the box for 3 second is 100 Watt.
Hence, Option (B) is correct.
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Answer:
<em>U = 66,150 J</em>
Explanation:
<u>Gravitational Potential Energy</u>
Gravitational potential energy is the energy stored in an object because of its vertical position or height in a gravitational field.
It can be calculated with the equation:
U=m.g.h
Where m is the mass of the object, h is the height with respect to a fixed reference, and g is the acceleration of gravity or .
The child of mass m=45 Kg is perched above a h=150 m ravine. His gravitational potential energy is:
U = 66,150 J