NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 940 - 944 of 5119

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Question 940

Question MCQ▾

The earth circles the sun once a year. How much work would have to be done on the earth to bring it to rest relative to the sun, (ignore the rotation of earth about -its own axis) Given that mass of the earth is 6 × 1024 kg and distance between the sun and earth is 1.5 × 108 km-

Choices

Choice (4)Response

a.

1.9 × 1023

b.

2.7 × 1024

c.

2.7 × 1033

d.

1.9 × 1024

Edit

Question 941

Question MCQ▾

The rate of burning of fuel in a rocket is 30 gm/sec. and comes out with and velocity 6 × 103 m/s. The force exerted by gas on rocket will be –

Choices

Choice (4)Response

a.

180 N

b.

200 N

c.

2.5 × 106 N

d.

300 N

Edit

Question 942

Question MCQ▾

Consider the double Atwood՚s machine as shown in the figure. What is acceleration of the masses?

Double Atwood Machine

Choices

Choice (4)Response

a.

g

b.

c.

d.

Edit

Question 943

Question MCQ▾

A body of mass 10 kg moving with a velocity of 5 m/s, rebounds on a wall with same velocity. The impulse on the body is -

Choices

Choice (4)Response

a.

100 Ns

b.

60 Ns

c.

120 Ns

d.

30 Ns

Edit

Question 944

Question MCQ▾

A bullet is fired from the gun. The gun recoils, the kinetic energy of the recoil shall be

Choices

Choice (4)Response

a.

less than the kinetic energy of the bullet

b.

greater than the kinetic energy of the bullet

c.

Equal to the kinetic energy of the bullet

d.

double that of the kinetic energy of the bullet

Edit