Laws of Motion-Force and Inertia (AIIMS Physics): Questions 1 - 2 of 2

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Question number: 1

» 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: 2

» Laws of Motion » Force and Inertia

MCQ▾

Question

A box is put on a scale which is adjusted to read zero, when the box is empty. A stream of pebbles is then poured into the base from a height 20m above its bottom at a rate of 5 pebbles per second. Each pebble has a mass 10g. If the pebbles collide with the box such that they immediately come to rest after collision, then the scale reading at time 5sec after the pebbles begin to fill the box is – (Takeg=10ms2)

Choices

Choice (4) Response
a.

3.5N

b.

7N

c.

35N

d.

70N

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