# Laws of Motion (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 89 - 94 of 116

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## Passage

A bead of mass m is attached to one end of a spring of natural length R and spring constant The other end of the spring is fixed at point A on a smooth ring of radius R as shown in figure. When bead is released to move then

## Question number: 89 (1 of 3 Based on Passage) Show Passage

» Laws of Motion » Force and Inertia

MCQ▾

### Question

Tangential acceleration of bead just after it is released.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 90 (2 of 3 Based on Passage) Show Passage

» Laws of Motion » Force and Inertia

MCQ▾

### Question

The normal reaction force at B is -

### Choices

Choice (4) Response

a.

3 mg/2

b.

3 mg

c.

mg

d.

mg/2

## Question number: 91 (3 of 3 Based on Passage) Show Passage

» Laws of Motion » Force and Inertia

MCQ▾

### Question

Initial elongation in the spring is -

### Choices

Choice (4) Response

a.

2R

b.

R

c.

d.

## Question number: 92

» Laws of Motion » Force and Inertia

MCQ▾

### Question

A bob is hanging over a pulley inside a car through a string. The second end of the string is in the hand of a person standing in the car. The car is moving with constant acceleration ‘a’ directed horizontally as shown in figure. Other end of the string is pulled with constant acceleration ‘a’ vertically. The tension in the string is –

### Choices

Choice (4) Response

a.

b.

c.

m (g - a)

d.

## Question number: 93

» 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 is held at rest.

### Choices

Choice (4) Response

a.

1N

b.

2N

c.

3N

d.

4N

## Question number: 94

» Laws of Motion » Force and Inertia

MCQ▾

### Question

In the above question, if at the end of 4 sec, the string be cut, the position of each particle in next 2 seconds will respectively be -

### Choices

Choice (4) Response

a.

17.856 m, 21.344 m

b.

-17.856 m, -21.344 m

c.

-21.344 m, 17.856 m

d.

-17.856 m, 21.344 m

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