Kinematics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 31 - 34 of 475

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Question 31

Question MCQ▾

if a particle travels a linear distance at speed v1 and comes back along the same track at speed v2 .

(1) Its average speed is arithmetic mean (v1 + v2) / 2

(2) Its average speed is harmonic mean 2 v1 v2 / (v1 + v2) /2

(3) Its average speed is geometric mean √ v1 v2

(4) Its average velocity is zero

Choices

Choice (4)Response

a.

1 and 2

b.

1,2 and 3

c.

2 and 4

d.

1 and 3

Edit

Question 32

Question Assertion-Reason▾

Assertion(Ꭺ)

The acceleration of a body of mass 2 kg thrown vertically upwards is always constant.

Reason(Ꭱ)

A body of all mass group travels under constant acceleration when only gravity acts on it.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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Question 33

Question MCQ▾

A particle moves along x-axis as x = 4 (t - 3) + a (t - 4)2

Which of the following is true?

Choices

Choice (4)Response

a.

The initial velocity of particle is 4

b.

The acceleration of particle is 2a

c.

The particle is at origin at t = 0

d.

None of the above

Edit

Question 34

Question MCQ▾

a particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is

Choices

Choice (4)Response

a.

4.0 m/s

b.

5.5 m/s

c.

4.8 m/s

d.

5.0 m/s

Edit