A body A of mass m is moving in a circular orbit of radius R about a planet. Another body B of mass m 2 collides with A with a velocity which is half v → 2 the instantaneous velocity v → of A. The collision is completely inelastic. Then, the combined body:

starts moving in an elliptical orbit around the planet

continues to move in a circular orbit

Escapes from the Planet's Gravitational field

Falls vertically downwards towards the planet

A body A of mass m is moving in a circular orbit of radius R about a planet. Another body B of mass m 2 collides with A with a velocity which is half v → 2 the instantaneous velocity v → of A. The collision is completely inelastic. Then, the combined body:

starts moving in an elliptical orbit around the planet

MEDIUM

JEE Main

IMPORTANT

Earn 100

A body A of mass $m$ is moving in a circular orbit of radius $R$ about a planet. Another body B of mass $\frac{m}{2}$ collides with A with a velocity which is half $(\frac{\vec{v}}{2})$ the instantaneous velocity $\vec{v}$ of A. The collision is completely inelastic. Then, the combined body:

50% studentsanswered this correctly

Important Questions on Work, Energy and Power

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 9th January 2020 Shift 2>Q 57

A particle of mass m is projected with a speed u from the ground at an angle

θ = \frac{π}{3}

w.r.t. horizontal (x-axis). When it has reached its maximum height, it collides completely inelastically with another particle of the same mass and velocity

u \hat{i} .

The horizontal distance covered by the combined mass before reaching the ground is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 9th April 2019 Shift 1>Q 58

A body of mass

2 k g

makes an elastic collision with a second body at rest and continues to move in the original direction but with one fourth of its original speed. What is the mass of the second body?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 9th April 2019 Shift 2>Q 59

A particle of mass

m

is moving with speed

2 v

and collides with a mass

2 m

moving with speed

v

in the same direction. After the collision, the first mass is stopped completely while the second one splits into two particles each of mass

m,

which move at an angle

45^{o}

with respect to the original direction. The speed of each of the moving particle will be

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 9th January 2019 Shift 1>Q 60

Three blocks

A, B

and

C

are lying on a smooth horizontal surface, as shown in the figure.

A

and

B

have equal masses

m

while

C

has mass

M

. Block

A

is given an initial speed

v

towards

B

due to which it collides with

B

perfectly inelastically. The combined mass collides with

C

, also perfectly inelastically.

\frac{5}{6} t h

of the initial kinetic energy is lost in the whole process. What is the value of

M / m

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 9th January 2019 Shift 1>Q 61

A block of mass

m,

lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant

k .

The other end of the spring is fixed, as shown in the figure. The block is initially at rest in its equilibrium position. If now the block is pulled with a constant force

F,

the maximum speed of the block is:
Question Image

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 9th January 2019 Shift 2>Q 62

A force acts on a

2 kg

object so that its position is given as a function of time as

x = 3 t^{2} + 5 .

What is the work done by this force in first

5

seconds?

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 8th April 2019 Shift 1>Q 63

A particle moves in one dimension from rest under the influence of a force that varies with the distance traveled by the particle as shown in the figure. The kinetic energy of the particle after it has traveled

3 m

is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 4 - Work, Energy and Power>JEE Main - 8th April 2019 Shift 2>Q 64

A body of mass

m_{1}

moving with an unknown velocity of

v_{1} \hat{i},

undergoes a collinear collision with a body of mass

m_{2}

moving with a velocity

v_{2} \hat{i} .

After the collision,

m_{1}

and

m_{2}

move with velocities of

v_{3} \hat{i}

and

v_{4} \hat{i},

respectively. If

m_{2} = 0.5 m_{1}

and

v_{3} = 0.5 v_{1},

then

v_{1}

is:

A body A of mass m is moving in a circular orbit of radius R about a planet. Another body B of mass m2 collides with A with a velocity which is half v→2 the instantaneous velocity v→ of A. The collision is completely inelastic. Then, the combined body:

Important Questions on Work, Energy and Power

Learn and Prepare for any exam you want !

A body A of mass $m$ is moving in a circular orbit of radius $R$ about a planet. Another body B of mass $\frac{m}{2}$ collides with A with a velocity which is half $(\frac{\vec{v}}{2})$ the instantaneous velocity $\vec{v}$ of A. The collision is completely inelastic. Then, the combined body: