Kinematics-Motion in a Straight Line (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 24 - 27 of 47

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Question number: 24

» Kinematics » Motion in a Straight Line

MCQ▾

Question

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.

5.0 m/s

b.

5.5 m/s

c.

4.8 m/s

d.

4.0 m/s

Question number: 25

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A plane is to fly due north. The speed of the plane relative to the air is 200 km/h, and the wind is blowing from west to east at 90 km/h.

(1) The plane should head in a direction of sin-1 (0.45)

(2) The plane should head in a direction of sin-1 (0.60)

(3) The relative velocity of plane w. r. t. ground is 179 km/h

(4) The relative velocity of plane w. r. t. ground is 149 km/h

Choices

Choice (4) Response

a.

1 and 2

b.

1, 2 and 3

c.

2 and 4

d.

1 and 3

Question number: 26

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A particle of mass m moves on the x-axis as follows: it starts from rest at t = 0 from the point x - 0 and comes to rest at t = 1 at the point x = 1. No other information is available about its motion at intermediate time (0 < t < 1). If a denotes the instantaneous acceleration of the particle, then

Choices

Choice (4) Response

a.

A cannot remain positive for all t in the interval 0 < t < l

b.

Must be > 4 at some point or points in its path

c.

Cannot exceed 2 at any point in its path

d.

= 2 at any point in its path.

Question number: 27

» Kinematics » Motion in a Straight Line

MCQ▾

Question

The position of a particle moving in the xy-plane at any time t is given by x = (4t 2 - 8t) metres, y = (5t 2 - 10t) metres. Select the correct statement about the moving particle from the following

Choices

Choice (4) Response

a.

The velocity of the particle is zero at t = 1 second

b.

The velocity of the particle is zero at t = 0 second

c.

The acceleration of the particle is zero at t = 0 second

d.

The velocity and acceleration of the particle are never zero

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