Kinematics (NEET Physics): Questions 209 - 212 of 233

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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: 209 (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: 210

» 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: 211

» 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: 212

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A bullet of mass 20 g hits a block of mass 1.98 kg suspended from a massless string of length 100 cm and sticks to it. The bullet flies down at an angle of 30° to the horizontal with a velocity of 200 m/s. Through what height the block will rise-

Choices

Choice (4) Response

a.

0.75 m

b.

0.45 m

c.

0.30 m

d.

0.15 m

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