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IMPORTANT

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A mass $m$ moving horizontally (along the $x$ -axis) with velocity $v$ collides and sticks to mass of $3 m$ moving vertically upward (along the $y$ -axis) with velocity $2 v$ . The final velocity of the combination is

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Important Questions on Work, Energy and Power

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JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 49

A ball is thrown horizontally from a height

h

above a staircase as shown in the figure. If the coefficient of restitution for any collision between the ball and the staircase is

e

, then the value of

h

for which the ball will bounce the same height above each step, is
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Physics Crash Course JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 50

A particle of mass

m

collides with a stationary particle and continues to move at an angle of

45 °

with respect to the original direction. The second particle also recoils at an angle of

45 °

to this direction. The mass of the second particle is (collision is elastic),

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JEE Main

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Physics Crash Course JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 51

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 JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 52

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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JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 53

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 JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 54

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 JEE Main>Chapter 4 - Work, Energy and Power>Level 1>Q 55

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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JEE Main

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Physics Crash Course JEE Main>Chapter 4 - Work, Energy and Power>Level 2>Q 1

Adjacent figure shows the force-displacement graph of a moving body, the work done in displacing body from $x = 0$ to $x = 35 m$ is equal to

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A mass m moving horizontally (along the x-axis) with velocity v collides and sticks to mass of 3 m moving vertically upward (along the y-axis) with velocity 2v. The final velocity of the combination is

Important Questions on Work, Energy and Power

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A mass $m$ moving horizontally (along the $x$ -axis) with velocity $v$ collides and sticks to mass of $3 m$ moving vertically upward (along the $y$ -axis) with velocity $2 v$ . The final velocity of the combination is