NEET Physics: Questions 192 - 196 of 2098

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Question number: 192

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle is moving in a circular path with velocity varying with time as v = 1.5t-+ 2t. If the radius of circular path is 2 cm. the angular acceleration at t = 2 sec will be –

Choices

Choice (4) Response

a.

400 rad/sec 2

b.

4 rad/sec 2

c.

0.4 rad/sec 2

d.

40 rad/sec 2

Question number: 193

» Laws of Motion » Centripetal Force

MCQ▾

Question

The maximum speed at which a car can turn round a curve of 30 meter radius on a level road if the coefficient of friction between the tiers and the road is 0.4, will be –

Choices

Choice (4) Response

a.

11.76 m/s

b.

17.84 m/s

c.

9.02 m/s

d.

10.84 m/s

Question number: 194

» Kinematics » Motion in a Plane

MCQ▾

Question

A particle is moving in a plane with a velocity given by, u = u0 i + (∞a cos ∞t) j, where i and j are unit vectors along x and y-axes respectively. If the particle is at the origin at t = 0, then its distance from the origin at time t = 3π/2∞ will be

Choices

Choice (4) Response

a.

((4πu02ω)2+a2)

b.

((3πu02ω)2+a2)

c.

((3πu02ω)+a2)

d.

((3πu02ω)2+a)

Question number: 195

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle moves in a circle of radius 10cm with a linear speed of 20m/s. The angular velocity will be –

Choices

Choice (4) Response

a.

25 rad/s

b.

75 rad/s

c.

50 rad/s

d.

200 rad/s

Question number: 196

» Kinematics » Motion in a Straight Line

MCQ▾

Question

If t 1 be the time taken by a body to clear the top of a building and be the time spent in air, then t 2: t 1 will be -

Choices

Choice (4) Response

a.

2: 1

b.

1: 1

c.

1: 2

d.

1: 4

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