Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 80

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Momentum is closely related to _____.

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Important Questions on Laws of Motion

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 81

A particle of mass

m

is moving with velocity

v_{1}

, it is given an impulse such that the velocity becomes

v_{2}

. Then magnitude of impulse is equal to

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 82

A mass of $1 kg$ is suspended by a string $A$ . Another string $C$ is connected to its lower end (see figure). If a sudden jerk is given to $C$ , then

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 83

A large force is acting on a body for a short time. The impulse imparted is equal to the change in

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 84

A ball weighing

10 g

hits a hard surface vertically with a speed of

5 m s^{- 1}

and rebounds with the same speed. The ball remains in contact with the surface for

0.01 s

. The average force exerted by the surface on ball is,

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 85

A cricket ball of mass

m

is bowled at a batsman and gets to the bat travelling at

v m s^{- 1} .

The batsman hits the ball, and it leaves his bat after

t

seconds at a speed of

\frac{v}{2} m s^{- 1} .

The magnitude of the force on the ball in newtons is

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 86

A ball of mass

250 g

moving with

20 m s^{- 1}

strikes a vertical wall and rebounds along the same line with a velocity of

15 m s^{- 1}

. If the time of contact is

0.1 s

, the force exerted by the wall on the ball is

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 87

Consider the following statement: When jumping from some height, you should bend your knees as you come to rest, instead, of keeping your legs stiff. Which of the following relations can be useful in explaining the statement?

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Physics Crash Course MHT-CET>Chapter 2 - Laws of Motion>Exercise 1>Q 88

In the adjoining figure, the position time graph of a particle of mass $0.1 kg$ is shown. The impulse at $t = 2 s$ is

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