Advertisements
Advertisements
Question
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Advertisements
Solution
Two examples in which the body possesses kinetic energy as well as potential energy are-
(i) A man climbing a hill
(ii) A bird flying in the sky
In both of the above examples, we can observe that the body has speed and its position is above the ground. Therefore, these bodies have kinetic and potential energy.
APPEARS IN
RELATED QUESTIONS
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
Is energy a vector quantity?
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
What kind of energy is possessed by the following?
A stretched rubber band _____________
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
In the case of negative work, the angle between the force and displacement is
An automobile engine propels a 1000 kg car (A) along a levelled road at a speed of 36 km h–1. Find the power if the opposing frictional force is 100 N. Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of the same mass and comes to rest. Let its engine also stop at the same time. Now the car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.
A body of mass 10 kg falls from a height of 20 m to 8 m. Calculate:
- the loss in potential energy of the body, and
- the total energy possessed by the body at any instant? (Take g = 10 m s-2)
