Kinematics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 92 - 96 of 475

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Question 92

Question MCQ▾

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 – t2 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.

rad/sec

b.

rad/sec

c.

rad/sec

d.

rad/sec

Edit

Question 93

Question MCQ▾

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.

8 s

c.

10 s

d.

4 s

Edit

Question 94

Question MCQ▾

The path followed by a body projected along y axis is given by y = x - 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.

3 √ 10 m/s

b.

10 √ 2 m/s

c.

10 √ 3 m/s

d.

2 √ 10 m/s

Edit

Question 95

Question MCQ▾

A body of mass 4 kg lying on a smooth surface is attached to a string 6 m long and then whirled round in a horizontal circle making 60 revolution per minute. The centripetal acceleration will be

Choices

Choice (4)Response

a.

23.68 m/s2

b.

236.6 m/s2

c.

2.368 m/s2

d.

1.18 m/s2

Edit

Question 96

Question MCQ▾

The length of second՚s hand in a watch is 1 cm. The change in velocity of its tip in 15 second is –

Choices

Choice (4)Response

a.

b.

c.

0

d.

Edit