Advertisements
Advertisements
Question
To what height should a box of mass 150 kg be lifted, so that its potential energy may become 7350 joules? (g = 9.8 m/s2)
Advertisements
Solution
Mass of the box, (m) = 150 kg
Acceleration due to gravity, (g) = 9.8 m/s2
Potential energy, (P.E) = 7352 J
Let the height above the ground be (h)
We can calculate potential energy as,
(P.E) = (m)(g)(h)
So, height can be calculated as,
`h = (P.E)/((m)(g)`
So ,
`h = 7350/((150)(9.8)` m
= `7350/1470` = 5 m
APPEARS IN
RELATED QUESTIONS
A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
A bucket full of water is on the first floor of your house and another identical bucket with the same quantity of water is kept on the second floor. Which of the two has greater potential energy?
A body of mass m is moved from ground to a height h. If the force of gravity on mass of 1 kg is g newton, find the force needed to lift the body.
A body of mass m is moved from ground to a height h. If force of gravity on mass of 1 kg is g newton, find the work done in lifting the body.
A body at a height possesses ______.
What happens to the potential energy of a body when its height is doubled?
On what factors does the gravitational potential energy of a body depend?
Prove that the kinetic energy of a freely falling object on reaching the ground is nothing but the transformation of its initial potential energy.
The potential energy of your body is least when you are ______.
Potential energy and heat energy are the two forms of mechanical energy.
