Laws of Motion-Equilibrium of Concurrent Forces (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 3 of 7

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Question number: 1

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2012

MCQ▾

Question

A particle is acted upon by a force given by F=αx3βx4 where α and β are positive constants. At the point x = 0, the particle is –

Choices

Choice (4) Response

a.

In unstable equilibrium

b.

In stable equilibrium

c.

In neutral equilibrium

d.

None of the above

Question number: 2

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2012

MCQ▾

Question

Two blocks (1 and 2) of equal mass m are connected by an ideal string (see figure below) over a frictionless pulley. The blocks are attached to the ground by springs having spring constants k1 and k2 such that k1 > k2.

Two blocks of equal mass attached with pulley

Two Blocks of Equal Mass Attached With Pulley

In figure two blocks (1 and 2) of equal mass m are connected by an ideal string over a frictionless pulley.

Initially, both springs are unstretched. The block 1 is slowly pulled down a distance x and released. Just after the release the possible value of the magnitudes of the acceleration of the blocks a1 and a2 can be –

Choices

Choice (4) Response

a.

Either (a1=a2=(k1k2)x2m) or (a1=a2=(k1k2)x(k1+k2)mg)

b.

Either (a1=a2=(k1+k2)x2m) or (a1=k1xmganda2=k2xm+g)

c.

(a1=a2=(k1k2)x2m)only

d.

(a1=a2=(k1+k2)x2m)only

Question number: 3

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2015

MCQ▾

Question

Two blocks of masses 5m and 4m in contact on a smooth table. A force P is first applied horizontally on block of mass 5 m and then on 4m. The contact forces between the two blocks in the two cases in the ratio

Two blocks of different masses connected

Two Blocks of Different Masses Connected

In figure two blocks of different masses 5 m and 4 m in contact on a smooth table. Force P is applied on both the block one by one.

Choices

Choice (4) Response

a.

3: 2

b.

5: 3

c.

2: 3

d.

1: 2

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