HARD

JEE Main

IMPORTANT

Earn 100

A particle is moving along the $x$ -axis with its coordinate with time $t$ given by $x (t) = 10 + 8 t - 3 t^{2} .$ Another particle is moving along the $y$ -axis with its coordinate as a function of time given by $y (t) = 5 - 8 t^{3} .$ At $t = 1 s,$ the speed of the second particle as measured in the frame of the first particle is given as $\sqrt{v} .$ Then $v (i n m s^{- 1})$ is ___________.

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Important Questions on Laws of Motion

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 9th January 2019 Shift 1>Q 45

A block of mass

10 kg

is kept on a rough inclined plane as shown in the figure. A force of

3 N

is applied on the block. The coefficient of static friction between the plane and the block is

0.6 .

What should be the minimum value of force

P,

such that the block does not move downward? (take

g = 10 m s^{- 2}

)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 9th January 2019 Shift 2>Q 46

A mass of

10 kg

is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point, the rope deviated at an angle of

45 °

at the roof point. If the suspended mass is at equilibrium, the magnitude of the force applied is

(g = 10 m s^{- 2})

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 10th April 2019 Shift 1>Q 47

A ball is thrown upward with an initial velocity

V_{0}

from the surface of the earth. The motion of the ball is affected by a drag force equal to

m γ v^{2}

(where

m

is mass of the ball,

v

is its instantaneous velocity and

γ

is a constant). Time taken by the ball to rise to its zenith is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 10th April 2019 Shift 2>Q 48

Two blocks

A

and

B

of masses

m_{A} = 1 k g

and

m_{B} = 3 k g

are kept on the table as shown in figure. The coefficients of friction between

A

and

B

0.2

and between

B

and the surface of the table is also

0.2 .

The maximum force

F

that can be applied on

B

horizontally, so that the block

A

does not slide over the block

B

is : [Take

g = 10 m / s^{2}

]

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 12th April 2019 Shift 1>Q 49

A man (mass

= 50 k g

) and his son (mass

= 20 k g

) are standing on a frictionless surface facing each other. The man pushes his son so that he starts moving at a speed of

0.70 m s^{- 1}

with respect to the man. The speed of the man with respect to the surface is:

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 12th April 2019 Shift 2>Q 50

A smooth wire of length

2 π r

is bent into a circle and kept in a vertical plane. A bead can slide smoothly on the wire. When the circle is rotating with angular speed

ω

about the vertical diameter

A B,

as shown in figure, the bead is at rest with respect to the circular ring at position

P

as shown. Then the value of

ω^{2}

is equal to:
Question Image

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 12th April 2019 Shift 2>Q 51

A block of mass $5 k g$ is (i) pushed in case $(A)$ and (ii) pulled in case $(B),$ by a force $F = 20 N,$ making an angle of $30^{o}$ with the horizontal, as shown in the figures. The coefficient of friction between the block and floor is $μ = 0.2 .$ The difference between the accelerations of the block, in case $(B)$ and case $(A)$ will be:
$(g = 10 m s^{- 2})$
Question Image

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 3 - Laws of Motion>JEE Main - 12th January 2019 Shift 2>Q 52

A block kept on a rough inclined plane, as shown in the figure, remains at rest upto a maximum force

2 N

down the inclined plane. The maximum external force up the inclined plane that does not move the block is

10 N .

The coefficient of static friction between the block and the plane is: [Take

g = 10 m s^{- 2}

]

Important Questions on Laws of Motion

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