MEDIUM
Earn 100

Define potential energy. On what factors does it depend?

Important Questions on Energy

EASY
Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?
EASY
An object of mass 15kg is moving with uniform velocity of 4m/s. What is the kinetic energy possessed by the object?
EASY
How fast should a man weighing 600 N run to achieve a kinetic energy of 750 J. Take g=10 m s-2.
EASY
In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be
HARD
A block of 9 kg is moving with a velocity of 4 m/s on a frictionless surface. The block comes to rest by compressing the spring. If the spring constant is 4x104 N/kg, then find the compression in the spring.
MEDIUM
A force acting on a 20 kg mass changes its velocity from 6 m/s to 3 m/s. The work done by the force is :
EASY
Which of the following graphs best represent the graphical relationship between Kinetic Energy (K.E) and momentum (P) of a body in motion?
MEDIUM
The energy produced by converting one microgram of matter completely into energy will be
EASY
A rod of length l and mass m fixed at one end, is hanging vertically. The other end is now raised so that the rod makes an angle 30° with horizontal line. The work done in the process will be :
HARD

A spring of spring constant K= 4x103N/m is compressed by 2 cm, then determine the potential energy stored in spring. 

EASY
The danger signals installed at the top of tall buildings are red. These can be easily seen from a distance because among all other colours, the red light
EASY
The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :
EASY
The work done to increase the velocity of a car from 30 km h-1 to 60 km h-1, if the mass of the car is 1500 kg, is:
MEDIUM

Ratio of potential energies of body A and body B will be

Question Image

EASY
Write in your words the definition of potential energy.
MEDIUM
Two bodies A and B have masses in the ratio 5:1 and their kinetic energies are in the ratio 125:9. Find the ratio of their velocities.                                                                                                                                
EASY
Light is a form of energy. Cite an example.
EASY
If the mass of a moving body is tripled (v remaining constant), the kinetic energy of the body gets