Kinematics (AIIMS Physics): Questions 29 - 35 of 39

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Question number: 29

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

A force of (2i^+6j^) newton acts on a body and displaces it by (4i^+8j^) meter. The work done by the force is:

Choices

Choice (4) Response
a.

49 J

b.

120 J

c.

72 J

d.

56 J

Question number: 30

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

Question

When a ball is thrown up vertically with velocity V0, it reaches a maximum height of ‘h’. If one wishes to half the maximum height then the ball should be thrown with velocity -

Choices

Choice (4) Response
a.

4V0

b.

14V0

c.

2V0

d.

12V0

Question number: 31

» Kinematics » Motion in a Straight Line

MCQ▾

Question

An object is thrown upward with a vertical velocity of 128fts . It will return in –

Choices

Choice (4) Response
a.

8 seconds

b.

4 seconds

c.

64 seconds

d.

16 seconds

Question number: 32

» Kinematics » Motion in a Plane

MCQ▾

Question

Fine the distance covered by a particle in 7 sec whose acceleration is (2t1)ms2 . Assume that at t=0,v=0 .

Choices

Choice (4) Response
a.

89.8 m

b.

103.4 m

c.

72.5 m

d.

60.2 m

Question number: 33

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

The vector P=2ai^+aj^+2k^ and Q=2ai^2j^k^ are perpendicular to each other. The positive value of a is:

Choices

Choice (4) Response
a.

3

b.

5

c.

1

d.

0

Question number: 34

» Kinematics » Motion in a Straight Line

MCQ▾

Question

How far will a body free – fall in 2 second if released from rest?

Choices

Choice (4) Response
a.

0.0 m

b.

4.9 m

c.

9.8 m

d.

19.6 m

Question number: 35

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

The vector A=ai^+aj^+15k^ and B=ai^j^2k^ are perpendicular to each other. The positive value of a is:

Choices

Choice (4) Response
a.

3

b.

5

c.

10

d.

6

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