# Kinematics (NEET Physics): Questions 173 - 178 of 233

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## Passage

Pseudo force is an imaginary force which is recognized only by a non-inertial observer to explain the physical situation according to newton’s laws. Magnitude of pseudo force F is equal to the product of the mass m of the object and the acceleration a of the frame of reference. The direction of the force is opposite to the direction of acceleration, F =-ma

## Question number: 173 (1 of 2 Based on Passage) Show Passage

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

### Question

A body is suspended by a string from the ceiling of an elevator. It is observed that the tension in the string is doubled when the elevator is accelerated. The acceleration will be -

### Choices

Choice (4) Response

a.

9.8 m/s 2

b.

4.9 m/s 2

c.

2.45 m/s 2

d.

19.6 m/s 2

## Question number: 174 (2 of 2 Based on Passage) Show Passage

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

### Question

A 25 kg lift is supported by a cable. The acceleration of the lift when the tension in the cable is 175 N, will be –

### Choices

Choice (4) Response

a.

- 9.8 m/s 2

b.

2.8 m/s 2

c.

14 m/s 2

d.

16.8 m/s 2

## Question number: 175

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A car of 1000 kg moving with a velocity of 18 km/hr is stopped by the brake force of 1000 N. The distance covered by it before coming to rest is –

### Choices

Choice (4) Response

a.

12.5 m

b.

144 m

c.

1 m

d.

162 m

## Question number: 176

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A body of mass 20 kg moving with a velocity of 3 m/s, rebounds on a wall with same velocity. The impulse on the body is -

### Choices

Choice (4) Response

a.

60 Ns

b.

120 Ns

c.

30 Ns

d.

180 Ns

## Question number: 177

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

A ship is steaming towards east at a speed of 12 ms -1. A woman runs across the deck at a speed of 5 ms -1 in the direction at right angles to the direction of motion of the ship i. e. towards north. What is the velocity of the woman relative to sea?

### Choices

Choice (4) Response

a.

12 m/s

b.

5 m/s

c.

13 m/s

d.

17 m/s

## Question number: 178

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

### Question

Consider two children riding on the merry-go-round Child 1 sits near the edge, Child 2 sits closer to the center. Let V1 and v2 denote the linear speed of child 1 and

Child 2, respectively. Which of the following is/are wrong?

Select the correct answers and mark it according to the following codes:

(1) We cannot determine V 1 & V 2 without more information

(2) v 1 = v 2

(3) v 1 < v 2

(4) v 1 > v 2

### Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

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