A body possess potential energy of $460\ J$ whose mass is $20\ kg$ and is raised to a certain height. What is the height when $g=10\ m/s^2$.

Academic Physics NCERT Class 9

Here given, Potential energy of the body $U=460\ J$

Mass of the body $m=20\ kg.$

$g=10\ m/s^2$

Let the body is raised to the height of $h$.

On using potential energy formula, $U=mgh$

$460=20\times10\times h$

Or $h=\frac{460}{20\times10}$

Or $h=2.3\ m$

Thus, the height is $2.3\ m$.

Tutorialspoint

Updated on: 10-Oct-2022

177 Views

An object of mass $m$ when raised To height $h$ possess a potential energy of $1200\ J$. Find the new potential energy if the same object is raised to height $\frac{h}{4}$.
A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is$(g=10\ m/s^2)$:50 J500 J5 J5000 J
A body of mass $100\ kg$ is lifted up by $10\ m$. Find: (i) the amount of work done. (ii) potential energy of the body at that height $(value\ of\ g=10\ m/s^2)$.
A body of mass $2\ kg$ is thrown vertically upwards with an initial velocity of $20\ m/s$. What will be its potential energy at the end of $2\ s$? $(Assume\ g=10\ m/s^2)$.
State whether the following statement is true or false: The potential energy of a body of mass $1\ kg$ kept at a height of $1\ m$ is $1\ J$.
What happens to the potential energy of a body when its height is doubled?
Calculate the work done in moving a body of mass 50 Kg through a height of 5 m.$(g=10\ m/s^2)$ a). 250 J b). 2500 J c). 25 x 103 J d). 2.5 x 105 J
To what height should a box of mass $150\ kg$ be lifted, so that its potential energy may become $7350\ joules$? $(g=9.8\ m/s^2)$.
An object of mass $40\ kg$ is raised to a height of $5\ m$ above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
(a) What is the difference between gravitational potential energy and elastic potential energy? Give one example of a body having gravitational potential energy and another having elastic potential energy.(b) If $784\ J$ of work was done in lifting a $20\ kg$ mass, calculate the height through which it was lifted.
A ball of mass $200\ g$ falls from a height of $5\ metres$. What is its kinetic energy when it just reaches the ground? $(g=9.8 m/s^2)$.
What is the kinetic energy of a body of mass $1\ kg$ moving with a speed of $2\ m/s$?
$9800\ joule$ of energy was spent to raise a mass of $50\ kg$, the mass was raised to a height of:a). $20\ m$b). $980\ m$c). $10\ m$d). none of these
The weight of a body is $50\ N$. What is its mass? $(g=9.8\ m/s^2)$.
A body is falling from a height $h$. After it has fallen a height $\frac{h}{2}$, it will possess$(a)$. only potential energy$(b)$. only kinetic energy$(c)$. half potential and half kinetic energy$(d)$. more kinetic and less potential energy

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements