NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 148 - 152 of 2142

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Question number: 148

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A motor car is travelling at 30 m/s on a circular road of radius 500 m. It is increasing its speed at the rate of 2 m/s 2. Its net acceleration is (in m/s 2) –

Choices

Choice (4) Response

a.

0

b.

1.8

c.

2

d.

2.7

Question number: 149

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball is thrown from ground level so as to just clear a wall 4 metres high at a distance of 4 metres and falls at a distance of 14 metres from the wall. The magnitude of velocity on the ball will be

Choices

Choice (4) Response

a.

√l82 m/s

b.

√181 m/s

c.

√186 m/s

d.

√185 m/s

Question number: 150

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The shaft of an electric motor starts from rest and on the application of a torque, it gains an angular acceleration given by a = 3t –t 2 during the first 2 seconds after it starts after which a = 0. The angular velocity after 6 sec will be –

Choices

Choice (4) Response

a.

3/10 rad/sec

b.

4/30 rad/sec

c.

10/3 rad/sec

d.

30/4 rad/sec

Question number: 151

» Kinematics » Uniform Circular Motion

MCQ▾

Question

A cane filled with water is revolved in a vertical circle of radius 4 m and water just does not fall down. The time period of revolution will be -

Choices

Choice (4) Response

a.

1 s

b.

4 s

c.

8 s

d.

10 s

Question number: 152

» Kinematics » Motion in a Plane

MCQ▾

Question

The path followed by a body projected along y axis is given by y = √3 x - (1/2) x2. If g = 10 m/s2, then the initial velocity of projectile will be - (x and y are in m)

Choices

Choice (4) Response

a.

10 √3 m/s

b.

10 √2 m/s

c.

2 √10 m/s

d.

3 √10 m/s

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