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The graph between potential energy U and displacement X in the state of stable equilibrium will be-

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Important Questions on Work, Energy and Power

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 27

A ball moving with velocity

2 m s^{- 1}

collides head-on with another stationary ball of double mass. If the coefficient of restitution is

0.5,

then their velocities (in

m s^{- 1}

) after the collision will be

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 28

In a collinear collision, a particle with an initial speed

v_{0}

strikes a stationary particle of the same mass. If the final total kinetic energy is

50 %

greater than the original kinetic energy, the magnitude of the relative velocity between the two particles, after the collision is:

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 29

Two bodies of masses

3 kg

and

2 kg

collide head-on. Their relative velocities before and after collision are

15 m s^{- 1}

and

5 m s^{- 1}

, respectively. The loss of kinetic energy of the system is,

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 30

A block of mass

0.50 kg

is moving with a speed of

2.00 m s^{- 1}

on a smooth surface. It strikes another mass of

1.00 kg

and then they move together as a single body. The energy loss during the collision is:

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 31

A body of mass

4 kg

moving with velocity

12 m s^{- 1}

collides with another body of mass

6 kg

at rest. If two bodies stick together after collision, then the loss of kinetic energy of system is

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 32

A body of mass

2 kg

moving with velocity of

6 m s^{- 1}

strike inelastically with another body of same mass at rest. The amount of heat evolved during collision is

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 35

Two small particles of equal masses start moving in opposite directions from a point $A$ in a horizontal circular orbit. Their tangential velocities are $v$ and $2 v$ respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A$ , these two particles will again reach the point $A$ ?

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Physics Crash Course NEET>Chapter 4 - Work, Energy and Power>Level 2>Q 37

During the head-on collision of two masses

1 kg

and

2 kg

the maximum energy of deformation is

\frac{100}{3} J .

If before the collision the masses are moving in the same direction, then their velocity of the approach before the collision is

The graph between potential energy U and displacement X in the state of stable equilibrium will be-

Important Questions on Work, Energy and Power

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