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A ball is released from a height $\rm{h}$ above a table. Given that air resistance is negligible and 50% of its kinetic energy is converted to other forms of energy at each bounce, what will be the height reached after the second bounce?
NETNUST Entry TestPhysicsWork and Energy
The escape velocity of a body from the earth is $\rm{V_{e}}$. If the radius of the earth contracts to $\rm{\frac{1}{4}th}$ of its value, keeping the mass of the earth constant, the escape velocity will be
NETNUST Entry TestPhysicsWork and Energy
What is the power of a body if 1 N force is acted upon a body having a constant velocity of 10 $\rm{ms^{-1}}$?
NETNUST Entry TestPhysicsWork and Energy
Which one of the following is not a conservative force?
NETNUST Entry TestPhysicsWork and Energy
A body of mass m moving with velocity v has a kinetic energy K. If its velocity is increased by 25%, what will be the work done in terms of K.E?
NETNUST Entry TestPhysicsWork and Energy
Dimensions of U are (Hint: U stands for absolute potential energy)
NETNUST Entry TestPhysicsWork and Energy
Work will be maximum when the angle between force and displacement is
NETNUST Entry TestPhysicsWork and Energy
A body of mass m moving with velocity v has a kinetic energy K. If its velocity is increased by 25%, what will be the new kinetic energy?
NETNUST Entry TestPhysicsWork and Energy
What is the unit of Power?
NETNUST Entry TestPhysicsWork and Energy
What will be the speed of electron having an energy of $1.82\times10^{-17}$ Joule?
NETNUST Entry TestPhysicsWork and Energy
The escape velocity of a particle of mass m from Earth's surface varies as:
NETNUST Entry TestPhysicsWork and Energy
Escape velocity from surface of Moon as compared to that from Earth surface is:
NETNUST Entry TestPhysicsWork and Energy
A bomb of mass 9 kg explodes into two pieces of mass 3 kg and 6 kg. The velocity of 3 kg mass is 16 m $sec^{-1}$. The K.E of 6 kg mass will be:
NETNUST Entry TestPhysicsWork and Energy
A bullet of mass 100 g is fired with a velocity of 10 m $sec^{-1}$ from a gun of mass 1 kg. The ratio of K.E of bullet to that of gun is:
NETNUST Entry TestPhysicsWork and Energy
The work done by the applied force is equal to the change in K.E. This is known as:
NETNUST Entry TestPhysicsWork and Energy
A rubber ball falling from a height of 5 m rebounds from a hard floor and loses 30% of its energy in the impact. The height of the rebound is:
NETNUST Entry TestPhysicsWork and Energy
When two protons are brought closer potential energy of both of them:
NETNUST Entry TestPhysicsWork and Energy
A body of 3 kg lies on the surface of the table 2 m high. It is moved on the surface of the table by 1 m. The change in potential energy will be:
NETNUST Entry TestPhysicsWork and Energy
The energy stored in the water of the dam is:
NETNUST Entry TestPhysicsWork and Energy
A car and a bus moving with the same kinetic energy are acted upon by the same retarding force, then:
NETNUST Entry TestPhysicsWork and Energy
Kinetic energy of a body of mass 2 kg is 8 J. Kinetic energy of a body of mass 4 kg moving with same velocity as that of first body, will be:
NETNUST Entry TestPhysicsWork and Energy
Work-energy principle states that work done on the body by applied force is equal to change in:
NETNUST Entry TestPhysicsWork and Energy
When velocity of a moving body is doubled, the quantity which is also doubled is its:
NETNUST Entry TestPhysicsWork and Energy
The work done on a body against force of gravity is called:
NETNUST Entry TestPhysicsWork and Energy
One joule is defined as:
NETNUST Entry TestPhysicsWork and Energy