Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 88 - 92 of 108

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Question number: 88

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 800 m/s. What velocity does rifle man acquire at the end of 10 shots?

Choices

Choice (4) Response

a.

0.3 m/s

b.

1.2 m/s

c.

0.5 m/s

d.

0.8 m/s

Question number: 89

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

In the figure shown, the velocity of each particle at the end of 4 sec will be -

Choices

Choice (4) Response

a.

2.18 m/s

b.

0.872 m/s

c.

0.218 m/s

d.

8.72 m/s

Question number: 90

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The mass of a rocket is 500 kg and the relative velocity of the gases ejecting from it is 250 m/s with respect to the rocket. The rate of burning of the fuel in order to give the rocket an initial acceleration 20 m/s 2 in the vertically upward direction (g = 10 m/s 2), will be –

Choices

Choice (4) Response

a.

45 kg/s

b.

10 kg/s

c.

60 kg/s

d.

30 kg/s

Question number: 91

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

rifle man, who together with his rifle has a mass of 100 kg, stands on a smooth surface fires 10 shots horizontally. Each bullet has a mass 10 gm and a muzzle velocity of 900 m/s. What velocity does rifle man acquire at the end of 10 shots.

Choices

Choice (4) Response

a.

0.3 m/s

b.

0.6 m/s

c.

0.9 m/s

d.

0.5 m/s

Passage

A small particle of mass m/10 is moving horizontally at a height of 3R/2 from ground with velocity 10 m/s. A perfectly inelastic collision occurs at point P of sphere of mass m placed on smooth horizontal surface. The radius of sphere is R, (m = 10 kg and R = 0.1 m) (Assume all surfaces to be smooth).

Question number: 92 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A small particle of mass m/10 is moving horizontally at a height of 3R/2 from ground with velocity 10 m/s. A perfectly inelastic collision occurs at point P of sphere of mass m placed on smooth horizontal surface. The radius of sphere is R, (m = 10 kg and R = 0.1 m) (Assume all surfaces to be smooth).

Angular speed of sphere just after collision is

Choices

Choice (4) Response

a.

b.