Laws of Motion-Law of Conservation of Linear Momentum (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 1 - 3 of 7

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Question number: 1

» Laws of Motion » Law of Conservation of Linear Momentum

Appeared in Year: 2011

MCQ▾

Question

At a distance l from a uniformly charged long wire, a charged particle is thrown radially outward with a velocity u in the direction perpendicular to the wire. When the particle reaches a distance 2l from the wire its speed is found to be 2u . The magnitude of the velocity, when it is a distance 4l away from the wire, is (ignore gravity)

Choices

Choice (4) Response

a.

2u

b.

3u

c.

22u

d.

4u

Question number: 2

» Laws of Motion » Law of Conservation of Linear Momentum

Appeared in Year: 2013

MCQ▾

Question

A bullet of mass m is fired horizontally into a large sphere of mass M and radius R resting on a smooth horizontal table.

A bullet of mass m is fired horizontally into a large sphere.

A Bullet of Mass M Is Fired Horizontally Into a Large Sphere.

In figure a bullet of mass m is fired horizontally in to a large sphere of mass M and radius r resting on a smooth horizontal table.

The bullet hits the sphere at a height h from the table and sticks to its surface. If the sphere starts rolling without slipping immediately on impact, then

Choices

Choice (4) Response

a.

hR=4m+3M2(m+M)

b.

hR=10m+7M5(m+M)

c.

hR=4m+3Mm+M

d.

hR=m+3Mm+2M

Question number: 3

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A bob of mass 0.575 kg hangs from the massless string of a long simple pendulum. A bullet of mass 0.025 kg is fired vertically from below into the bob. The bullet gets embedded into the bob and the combination rises vertically through a height of 0.8 m. If g = 10 ms-2, then the velocity of the bullet is –

Choices

Choice (4) Response

a.

8ms1

b.

8000ms1

c.

800ms1

d.

80ms1

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