Test Details

Work, Energy and Power

Nov 30, 1:00 PM

60 minutes

Dec 01, 1:00 PM

30.0 marks

MCQ

30 questions

Ashish kumar wadia

This is physics guruji-wadia sir Teaching experience:- 8 years + 20 NEET SELECTIONS TILL DATE

Class Details

Physics

11th CBSE & RBSE (Eng)

Physics

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Question Text

Question 1 :
A coconut fruit hanging high in a palm tree has ......... owing to its location.

Question 2 :
Identify which of the following quantities remain conserved during an elastic collision?

Question 3 :
 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 4 :
A heating unit on an electric stove is rated at $880 W$. It is connected to a power supply of $220 V$. The current it will consume is

Question 6 :
A body of mass, $m$, is rotated in a vertical circle of radius, $R$, by means of a light string. If the velocity of body is $\sqrt{5gR}$ at the lowest point of vertical circle, then tension in the string is:

Question 9 :
The energy required to raise a given volume of water from a well can be:

Question 11 :
A ball moving with a velocity v strikes a wall moving toward the ball with a velocity u. An elastic impact lasts for t sec. Then the mean elastic force acting on the ball is

Question 12 :
The coefficient of restitution of a perfectly elastic collision is :

Question 13 :
Two identical bodies moving in opposite direction with same speed, collided with each other. If the collision is perfectly elastic then

Question 15 :
When two bodies stick together after collision, the collision is said to be:

Question 16 :
Name the type of energy (kinetic energy $K$ or potential energy $U$) possessed in the following case.The bob of a simple pendulum at its extreme position.

Question 17 :
Choose the correct option who describes a perfectly inelastic collision free of external forces?

Question 18 :
A ball is thrown up vertically after going to a certain height, it returns to the ground, then its potential energy is maximum.

Question 19 :
A 6 kg mass travelling at $2.5 ms^{-1}$ collides head on with a stationary 4 kg mass. After the collision the 6 kg mass travels in its original direction with a speed of $1 ms^{-1}$. The coefficient of restitution is

Question 20 :
 A $500$ gm gun fires a $2 gm$ projectile with a muzzle velocity of $1600ms^{-1}$. The velocity of the gun is:

Question 21 :
A 2 kg mass moving on a smooth frictionless surface with a velocity of $10 ms^{-1}$ hits another 2 kg mass kept at rest, in an inelastic collision. After collision, if they move together,

Question 22 :
Complete the following sentence:The potential energy of a body is the energy by virtue of its _______ .

Question 23 :
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 24 :
Which part of a mango tree has the highest potential energy?

Question 27 :
A ball is dropped from a height of $20$m on a floor for which $e=1/2$. The height attained by the ball after the second collision.

Question 28 :
In a one-dimensional elastic collision, the relative velocity of approach before collision is equal to:

Question 29 :
A $1$ $kg$ mass at rest is subjected to an acceleration of $5  \ m/s^{2}$ and travels $40$ $m$. The average power during the motion is:

Question 30 :
Two bodies of equal masses are places at heights $h$ and $2h$. The ratio of  their gravitational potential energies is:

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