NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 273 - 277 of 2184

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Question number: 273

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

Question

A body of mass 2 kg is moving along x-defection with a velocity of 2 m/sec. If a force of 4 N is applied on it along y-direction for 1 sec, the final velocity of particle will be -

Choices

Choice (4) Response

a.

1/2√2 m/s

b.

2√2 m/s

c.

√2m/s

d.

1/√2 m/s

Question number: 274

» Kinematics » Uniform and Non-Uniform Motion

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Question

A force of ( ) N acted on a body of mass 20 kg. The displacement after 20 sec, if it starts from rest, will be -

Choices

Choice (4) Response

a.

500 m along with x axis

b.

200 m along with x axis

c.

100 m along with x axis

d.

All of the above

Question number: 275

» Electrostatics » Electric Potential

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Question

A particle A has charge +q and a particle B has charge +4q with each of them having the same mass m. When allowed to fall from rest through the same electric potential difference, the ratio of their speed will become

Choices

Choice (4) Response

a.

4: 1

b.

1: 2

c.

1: 4

d.

2: 1

Question number: 276

» Rotational Motion » Torque

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Question

Find the torque of a force F =- i + 2 j + 3 k acting at the point r = i + 3 j + 5k

Choices

Choice (4) Response

a.

-i - 8j + 5k

b.

7i - 19j + 19k

c.

14i - 38j + 16k

d.

-21i + 3j + 5k

Question number: 277

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

Question

A cricket ball of mass 200 g is moving with a velocity of 12m/sec and is hit by a bat so that the ball is turned back with a velocity of 24 m/sec; the force on the ball acts for 0.5 sec, then the average force exerted by the bat on the ball will be

Choices

Choice (4) Response

a.

480 N

b.

400 N

c.

4.8 N

d.

40 N