Question

11. An object of mass 40kg is raised to a height of 5m above the ground. What is it: Ep?​

Answer 1

Answer:

The potential energy of the object is 1960 J.

Explanation:

We have given that,

• Mass of object ( m ) = 40 kg
• Height of object from ground ( h ) = 5 m
• Acceleration due to gravity ( g ) = 9.8 m/s²

We have to find the potential energy $\displaystyle{\sf\:(\:E_p\:)}$ of the object.

Now, we know that,

$\displaystyle{\pink{\sf\:Potential\:energy\:=\:m\:g\:h\:}}$

$\displaystyle{\implies\sf\:E_p\:=\:40\:kg\:\times\:9.8\:m\:/\:s^2\:\times\:5\:m}$

$\displaystyle{\implies\sf\:E_p\:=\:40\:\times\:5\:\times\:9.8\:kg\:m^2\:/\:s^2}$

$\displaystyle{\implies\sf\:E_p\:=\:200\:\times\:9.8\:kg\:m^2\:/\:s^2}$

$\displaystyle{\implies\sf\:E_p\:=\:1960\:kg\:m^2\:/\:s^2}$

$\displaystyle{\implies\sf\:E_p\:=\:1960\:joules}$

$\displaystyle{\implies\underline{\boxed{\red{\sf\:Potential\:energy\:=\:1960\:J\:}}}}$

∴ The potential energy of the object is 1960 J.