Kerala (English Medium) Std 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
Which one of these physicists is from Britain?

(A) Thomas Alva Edison	(B) James Prescott Joule
(C) C.V.Raman	(D) None of these

Question-2
The capacity to do work is

(A) Force	(B) Energy
(C) Momentum	(D) Power

Question-3
What is the velocity of body of mass 100 g having a K.E. of 20 J?

(A) 2 m s^-1	(B) 20 m s^-1
(C) 40 m s^-1	(D) 400 m/s

Question-4
By what factor does the kinetic energy of a particle increase if the velocity is increased by a factor of three?

(A) 6	(B) 7
(C) 8	(D) 9

Question-5
An object of mass 15 kg is moving with a uniform velocity of 4m s^-1 .What is the kinetic energy possessed by the object?

(A) 120 J	(B) 100 J
(C) 220 J	(D) 200 J

Question-6
Which of the following is the energy possessed by a body by virtue of its motion?

(A) Potential energy	(B) Kinetic energy
(C) Electrical energy	(D) Mechanical energy

Question-7
Two bodies of equal weight are kept at heights of h and 1.5 h respectively.The ratio of their P.E. is

(A) 3 : 2	(B) 2 : 3
(C) 1 : 1	(D) 1 : 2

Question-8
Which of the following is the correct expression for potential energy of an object?

(A) P E = mgh	(B) P E = 1/2 m v²
(C) P E = 2m g h	(D) P E = mg/h

Question-9
A force of 7N acts on an object. The displacement is 8m in the direction of force. What is the work done?

(A) 24 J	(B) 56 J
(C) 54 J	(D) 64 J

Question-10
A girl pulls a trolley and the trolley moves through a distance. What do you think about this situation?

(A) Here work is done	(B) No work is done
(C) Only force is given	(D) None of these.

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Std 9

Kerala (English Medium)

Practice in Related Chapters
Magnetism and Electricity
Motion
Refraction of Light
Gravitation
Work,Energy and Power
Electricity
Wave Motion
Forces of Fluids