NEET Physics: Questions 909 - 912 of 2142

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Passage

Read the passage given below and answer the questions that follow:

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).

Sphere of radius R – In perfect inelastic collision

Sphere of Radius R – in Perfect Inelastic Collision

In above figure we show that sphere of radius R and collision of the particle at point p of sphere of mass m placed on smooth horizontal surface.

Question number: 909 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

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).

Sphere of radius R – with radius R and R/2

Sphere of Radius R – With Radius R and R/2

n above figure we show that sphere of radius R and collision of the particle at point p of sphere of mass m placed on smooth horizontal surface.

Speed of particle just after collision is

Choices

Choice (4) Response

a.

approx. 20.0 m/s

b.

approx. 15.0 m/s

c.

approx. 5.0m/s

d.

approx. 10 m/s

Question number: 910

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

In the above example, the height ascended or descended, as the case may be, during that time i. e. 8 sec will be -

Choices

Choice (4) Response

a.

1.744 m

b.

6.976 m

c.

17.44 m

d.

None of the above

Question number: 911

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A bullet of mass 0.01 kg travelling at a speed of 300 m/s strikes a block of mass 2 kg, which is suspended by a string of length 5 m. The center of gravity of the block is found to rise a vertical distance of 0.1 m The speed of the bullet after it emerges from the block will be -

Choices

Choice (4) Response

a.

220 m/s

b.

110 m/s

c.

20 m/s

d.

1.4 m/s

Question number: 912

» Laws of Motion » Laws of Friction

MCQ▾

Question

Block A weighs 4 N and block B weighs 8 N. The coefficient of kinetic friction is 0.25 for all surfaces. find the force F to slide B at a constant speed when A and B are connected by a light cord passing over a smooth Pulley.

Choices

Choice (4) Response

a.

2N

b.

5N

c.

3N

d.

1N

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