Laws of Motion (AIIMS Physics): Questions 10 - 13 of 17

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Question number: 10

» Laws of Motion » Force and Inertia

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

Frictional forces are conservative forces.

Reason (Ꭱ)

Potential energy can be associated with frictional forces.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are false
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Ꭺ is true but Ꭱ is false

Question number: 11

» Laws of Motion » Centripetal Force

MCQ▾

Question

A body of mass 7 kg is moving in a circle of diameter 2 m with an angular velocity of 5radians . The centripetal force is –

Choices

Choice (4) Response
a.

350 N

b.

75 N

c.

175 N

d.

100 N

Question number: 12

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A particle of mass ‘m’ moving with velocity 20ms collides inelastically with a stationary particle of mass ‘3m’. The speed of the system after collision will be

Choices

Choice (4) Response
a.

5ms

b.

10ms

c.

40ms

d.

20ms

Question number: 13

» Laws of Motion » Impulse

MCQ▾

Question

In below figure between two rigid walls P and Q, a block of mass 1.5kg is moving with constant velocity u=2ms , towards a spring of spring constant k=13.5Nm . The block is moving from P and strikes at the end R of the spring at distance x=80cm . If the collision between the block and wall P is perfectly elastic, the time period T (in seconds) of the motion of the block will be –

A block is moving toward a spring

A Block Is Moving Toward a Spring

In figure, a block is moving towards a spring between two rigid walls P and Q.

Choices

Choice (4) Response
a.

(3π+0.8)s

b.

(π3+0.8)s

c.

(3π+1)s

d.

(π3+1)s

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