Test Details

Work, Power & Energy Test

STUDY POINT CBSE ICSE@

Nov 16, 4:15 PM

60 minutes

Nov 16, 5:15 PM

20.0 marks

MCQ

20 questions

STUDY POINT CBSE ICSE

YOUR SUCCESS IS OUR SUCCESS

Class Details

Physics

Class XI

Physics

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Question Text

Question 1 :
Assertion: KE is conserved at every instant of (elastic) collision. Reason: No deformation of matter occurs in elastic collision.

Question 2 :
The energy required to raise a given volume of water from a well can be:

Question 3 :
 Assertion (A) : The value of coefficient of restitution is independent of the masses and velocities of the colliding bodies but depends on their materials. Reason (R) : Coefficient of restitution is the ratio of the relative velocity of separation or the relative velocity of approach

Question 4 :
 A body $P$  moving with a velocity of $20$ms$^{-1}$ collides with another body $Q$ of same mass at rest. After collision $P$ comes to rest. What is the velocity of the body $Q$ ?

Question 6 :
A ball of mass M moving with a velocity V collides head on elastically with another of same mass but moving with a velocity v in the opposite direction. After collision,

Question 7 :
Two bodies of equal masses are placed at heights $h$ and $2h$. Find the ratio of their gravitational potential energies.

Question 8 :
When a car of mass $1200\ kg$ is moving with a velocity of $15\ ms^{-1}$ on a rough horizontal road. Its engine is switched off. How far does the car travel before it comes to rest if the coefficient of kinetic friction between the road and tyres of the car is $0.5$? $(g=10ms^{-2})$.

Question 9 :
Simple pendulum of length l has a maximum angular displacement $\theta$. The maximum kinetic energy of the bob is?

Question 10 :
A man of 30 kg jumps up to a height of 2 m . What is his potential energy at the highest point ?

Question 15 :
The coefficient of restitution e for a perfectly inelastic collision is:

Question 16 :
An object of mass 1kg has a PE of 1J relative to the ground when it is at a height of:

Question 18 :
A body of mass $ m_1 $ moving with a velocity 10 m/s collides elastically with another body at rest of mass $ m_2 $. After collision the velocites of the two bodies are 2 m/s and 5 m/s respectively along the direction of motion of $ m_1 $. The ration of $ \dfrac { m_ {1} }{ m_ {2} }  is $

Question 19 :
A body of mass $m$ moving at a constant velocity $v$ hits another body of the same mass moving at the same velocity but in the opposite direction and sticks to it. The common velocity after collision is

Question 20 :
Which of the following is not an example of potential energy?

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