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MCQ Questions for Class 9 Science Chapter 11 Work and Energy with Answers
MCQ Questions for Class 9 Science Chapter 11 Work and Energy with Answers
Work And Energy Class 9 MCQ Question 1.
When a body falls freely towards the earth, then its total energy
(a) increases
(b) decreases
(c) remains constant
(d) first increases and then decreases
Answer: (c) remains constant
MCQ On Work And Energy Class 9 Question 2.
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
(a) does not change
(b) becomes twice to that of initial
(c) becomes 4 times that of initial
(d) becomes 16 times that of initial
Answer: (a) does not change
Work And Energy Class 9 MCQ With Answers Question 3.
In case of negative work the angle between the force and displacement is (NCERT Exemplar)
(a) 0°
(b) 45°
(c) 90°
(d) 180°
Answer: (d) 180°
Class 9 Work And Energy MCQ Question 4.
An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are lo m above the ground, they have the same.
(a) acceleration
(b) momenta
(c) potential energy
(d) kinetic energy
Answer: (a) acceleration
Class 9 Science Chapter 11 MCQ Question 5.
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 ms²)
(a) 6 × 10³ J
(b) 6 J
(c) 0.6 J
(d) zero
Answer: (d) zero
MCQ Of Work And Energy Class 9 Question 6.
Which one of the following is not the unit of energy?
(a) joule
(b) newton metre
(c) kilowatt
(d) kilowatt hour
Answer: (c) kilowatt
Work And Energy MCQ Class 9 Question 7.
The work done on an object does not depend upon the
(a) displacement
(b) force applied
(c) angle between force and displacement
(d) initial velocity of the object
Answer: (d) initial velocity of the object
Work And Energy Class 9 MCQ Questions With Answers Question 8.
Water stored in a dam possesses
(a) no energy
(b) electrical energy
(c) kinetic energy
(d) potential energy
Answer: (d) potential energy
Class 9 Science Ch 11 MCQ Question 9.
A body is falling from a height h. After it has fallen a height h2, 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
Answer: (c) half potential and half kinetic energy
MCQ Work And Energy Class 9 Question 10.
The number of joules contained in 1 kWh is
(a) 36 × 105 J
(b) 3.6 × 107 J
(c) 36 × 108 J
(d) 3.7 × 107 J
Answer: (a) 36 × 105 J
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