NEET Physics: Questions 886 - 890 of 2098

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Question number: 886

» Work, Energy and Power » Potential Energy

MCQ▾

Question

A body of mass 1 kg initially at rest explodes and breaks into three fragments of masses in the ratio 1: 1: 3. The two pieces of equal mass fly off perpendicular to each other with a speed of 30 m/sec each. What is the velocity of the heavier fragment?

Choices

Choice (4) Response

a.

202m/s

b.

102m/s

c.

52m/s

d.

152m/s

Question number: 887

» 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 -

 Finding the velocity of the particle at the end of string

Finding the Velocity of the Particle at the End of String

Calculating the velocity of the particle

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: 888

» Laws of Motion » Laws of Friction

MCQ▾

Question

Find the maximum value of M/m in the situation shown in figure so that the system remains at rest. Friction coefficient at both the contacts is u.

Find the maximum value of M/m

Find the Maximum Value of M/m

System is at rest and friction coefficient at both the contacts is u

Choices

Choice (4) Response

a.

μsinθμcosθ

b.

μcosθμsinθ

c.

μsinθ+μcosθ

d.

2μsinθμcosθ

Passage

Read the passage given below and answer the questions that follows: A block of mass 1 kg is placed on a rough horizontal surface. A spring is attached to the block whose other end is joined to a rigid wall, as shown in the figure. A horizontal force is applied on the block so that it remains at rest while the spring is elongated by x.

xμmgk

Let F max and F min be the maximum and minimum values of force F for which the block remains a equilibrium. For a particular x,

F max - F min = 2N

Also shown is the variation of F max + F min versus x, the elongation of the spring.

Question number: 889 (1 of 3 Based on Passage) Show Passage

» Laws of Motion » Laws of Friction

MCQ▾

Question

The value of F, if x = 3 cm. is -

Choices

Choice (4) Response

a.

0.2 N

b.

0

c.

1N

d.

5N

Question number: 890 (2 of 3 Based on Passage) Show Passage

» Laws of Motion » Laws of Friction

MCQ▾

Question

The spring constant of the spring is -

Choices

Choice (4) Response

a.

50 N/m

b.

2.5 N/m

c.

20 N/m

d.

25 N/m

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