NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 33 - 37 of 2320

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Question number: 33

» Kinematics » Motion in a Straight Line

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Question

If the displacement of a particle is (2t 2 + t + 5) meter then, what will be ace. at t = 5 second?

Choices

Choice (4)Response

a.

21 m/s 2

b.

10 m/s 2

c.

20 m/s 2

d.

4 m/s 2

Question number: 34

» Kinematics » Motion in a Straight Line

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the displacement x of a particle varies with time t, x = a + b , where a, b, α and β are positive constants.

The velocity of the particle will

Choices

Choice (4)Response

a.

Be independent of α and β

b.

Drop to zero when α = β

c.

Go on decreasing with time

d.

Go on increasing with time

Question number: 35

» Kinematics » Motion in a Straight Line

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Question

Two cars A and B are travelling in the same direction with velocities V 1 and v 2 (v 1 > v 2). When the car A is at a distance d ahead of the car B, the driver of the car A applied the brake producing a uniform retardation a. There will be no collision when

Choices

Choice (4)Response

a.

d

b.

d

c.

d

d.

d

Question number: 36

» Kinematics » Motion in a Plane

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the effective acceleration of a body, when thrown upwards with acceleration a will be:

Choices

Choice (4)Response

a.

b.

(a – g)

c.

d.

(a + g)

Question number: 37

» Physics and Measurement » Dimensions of Physical Quantities

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Question

In the relation , P is pressure, Z is the distance, k is Boltzmann constant and θ is the temperature. The dimensional formula of β will be

Choices

Choice (4)Response

a.

[M 0 L 2 T -1]

b.

[M 1 L 2 T 1]

c.

[M 0 L 2 T 0]

d.

[M 1 L 0 T -1]

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