CUET Level- II JEE Mock Test - 5 (Physics)

A man in a train in motion is facing the engine. He tosses a coin up, the coin falls behind him. The train is

• moving forward with uniform speed.
  

• moving forward with acceleration.
  

• moving backward with uniform speed.
  

• moving forward with retardation

A jet plane flying in atmosphere gets reaction from

• gravity
  

• atmosphere
  

• gases ejected by the plane
  

• gravity and atmosphere

A fireman wants to slide down a rope. The breaking load for the rope is 34 th of the weight of the man. With what minimum acceleration should the fireman slide down? Acceleration due to gravity is g.

• g/4

• g/3

• 3/4 g

• zero

Ratio of force and acceleration measures :

• inertia
  

• velocity
  

• impulse
  

• momentum

Rocket works on the principle of conservation of:

• energy
  

• momentum
  

• mass
  

• All of the above

A bullet is fired horizontally and gets embedded in a block kept on a table. If the table is frictionless, then

• only momentum is conserved.
  

• only potential energy is not conserved.
  

• only K.E. is conserved.

• none

A shell is fired from a canon with a velocity v ms^-1 at an angle 6 with the horizontal direction. At the highest point in its path, it explodes into two pieces of equal mass. One of the pieces retraces its path to the canon and the speed of the other piece (in ms^-1) just after the explosion is

• v cos θ

• 3v cos θ

• 2v cos θ

• v/2 cos θ

The work performed on an object does not depend upon

• the displacement.
  

• the force applied.
  

• the angle at which the force is applied to the displacement
  

• initial velocity of the object.

A ball is dropped from a height of 15 m. It gets embedded in sand by 10 mm and then stops. Which of the following is conserved?

• Temperature
  

• Momentum
  

• Kinetic energy

• static energy

A body of mass M accelerates uniformly from rest to a velocity v in time t. What is the instantaneous power delivered to the body at time T.

• mv/t T

• mv²/t T

• m²v²/t² T

• mv²/t² T