Solve

Guides

Gravitational Potential Energy

Question

The work done by an external agent to shift a point mass from infinity to the centre of the earth is W. Then choose the correct relation.

A

W

=

0

B

W > 0

C

W < 0

D

W

\leq

0

Open in App

Solution

Verified by Toppr

$W_{e x t} = Δ U = U_{f} - U_{i} = U_{f} - 0 = U_{f}$
$W_{e x t} = \frac{- 3 G M m}{2 R} \to W_{e x t} < 0$

Was this answer helpful?

1

Similar Questions

Q1

The gravitational field in a region is given by $¯ E = (10 N / k g) (¯ i + ¯ j)$ . The work done by an external agent to slowly shift a particle of mass 2 kg from the point (0,0) to a point (5 m, 4 m) is..

View Solution

Q2

If we say that the electric potential of a point in space is 10 V, what do you understand from it? (Take potential at infinity as 0V)

View Solution

Q3

A uniformly charged sphere is placed as shown. Find the amount of work done by an external agent to bring a 2C charge (Very slowly without acceleration) from infinity to the point P? Take infinity as the reference

View Solution

Q4

When a mass $2 kg$ is shifted from infinity to a point in gravitational field, it is found that work done by external force is $- 100 J$ . If the mass is doubled and taken again from the same point to infinity without accelerating it, then the work done by gravitational force will be

View Solution

Q5

A ring of mass $m_{1}$ and radius $R$ is fixed in space at some location. An external agent brings a point mass $m_{2}$ from infinity to the centre of the ring. Work done by the external agent will be

View Solution

Solve

Guides