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A bird of mass $400 g$ is flying horizontally at a certain height with constant acceleration of $5 m s^{- 2}$ . The force exerted by surrounding air on the bird has a magnitude $(g = 10 m s^{- 2})$

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Important Questions on Newton's Law of Motion

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 1>Q 21

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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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 1>Q 22

A diwali rocket is ejecting

0.05 kg

of gases per second at a velocity of

400 m s^{- 1}

. The accelerating force on the rocket is

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 1>Q 23

A body of mass

2 kg

moving on a horizontal surface with an initial velocity of

4 m s^{- 1}

comes to rest after

2 s

. If one wants to keep this body moving on the same surface with a velocity of

4 m s^{- 1}

the force required is

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 1>Q 24

If the tension in the cable of

1000 kg

elevator is

1000 kg

weight, the elevator

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 1>Q 25

A cork is submerged in water by a spring attached to the bottom of a pail. When the pail is kept in a elevator moving with an acceleration downwards, the spring length

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 2>Q 1

A fully loaded elevator has a mass of

6000 kg

. The tension in the cable as the elevator is accelerated downward with an acceleration of

2 m s^{- 2}

is (Take

g = 10 m s^{- 2}

)

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 2>Q 2

A light string goes over a frictionless polley. At its one end hangs a mass of

2 kg

and at the other end hangs a mass of

6 kg

. Both the masses are supported by hands to keep them at rest. When the masses are released, they being to move and the string gets taut. (Take

g = 10 m s^{- 2}

) The tension in the string during the motion of the masses is :

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Practice Book for KVPY Aptitude Test - Stream SA Physics>Chapter 4 - Newton's Law of Motion>Exercise 2>Q 3

A block of mass

M

is at rest on a plane surface inclined at an angle

θ

to the horizontal. The magnitude of the force exerted by the plane on the block is:

A bird of mass 400 g is flying horizontally at a certain height with constant acceleration of 5 m s-2. The force exerted by surrounding air on the bird has a magnitude g=10 m s-2

Important Questions on Newton's Law of Motion

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A bird of mass $400 g$ is flying horizontally at a certain height with constant acceleration of $5 m s^{- 2}$ . The force exerted by surrounding air on the bird has a magnitude $(g = 10 m s^{- 2})$