Rewrite the following sentences using proper alternative.

a. The potential energy of your body is least when you are .....

(i) sitting on a chair
(ii) sitting on the ground
(iii) sleeping on the ground
(iv) standing on the ground

b. The total energy of an object falling freely towards the ground ...

(i) decreases
(ii) remains unchanged

(iii) increases
(iv) increases in the beginning and then decreases

c. If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy ....

(i) will be twice its original energy

(ii) will not change
(iii) will be 4 times its original energy
(iv) will be 16 times its original energy.

d. The work done on an object does not depend on ....

(i) displacement
(ii) applied force
(iii) initial velocity of the object
(iv) the angle between force and displacement.

Open in App

Solution

a. The potential energy of your body is least when you are sleeping on the ground.

b. The total energy of an object falling freely towards the ground remains unchanged.

c. If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy will not change.

d. The work done on an object does not depend on initial velocity of the object.

Suggest Corrections

Similar questions

Write detailed answers?

a. Explain the difference between potential energy and kinetic energy.

b. Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.

c. Prove that the kinetic energy of a freely falling object on reaching the ground is nothing but the transformation of its initial potential energy.

d. Determine the amount of work done when an object is displaced at an angle of 30^o with respect to the direction of the applied force.

e. If an object has 0 momentum, does it have kinetic energy? Explain your answer.

f. Why is the work done on an object moving with uniform circular motion zero?

A car is accelerated on a levelled road and acquires a velocity 4 times of its initial velocity. During this process, the potential energy of the car :

(a) does not change

(b) becomes twice that of initial potential energy

(d) becomes 16 times that of initial potential energy

For the same kinetic energy of a body, what should be the change in its velocity if its mass is increased to four times its original value?

If i am sitting without doing anything, will i have potential energy in me? We will requore energy to do work. So what is that energy called that you use before producing kinetic energy? Will i have kinetic energy of i apply any kind of force (muscular, gravitational and so on)

Q. The work done on an object does not depend on the :

(a) displacement
(b) angle between force and displacement
(c) force applied
(d) initial velocity of the object

Join BYJU'S Learning Program