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 |
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 |
Question 942
Question MCQ▾
Consider the double Atwood՚s machine as shown in the figure. What is acceleration of the masses?
Choices
Choice (4) | Response | |
---|---|---|
a. | g | |
b. | ||
c. | ||
d. |
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 |
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 |