# Kinematics-Motion in a Straight Line (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 45 - 47 of 47

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## Question number: 45

» Kinematics » Motion in a Straight Line

MCQ▾

### Question

A motor car is travelling at 50 m/s on a circular road of radius 600 m. It is increasing its speed at the rate of 4 m/s 2. Its net acceleration is (in m/s 2) –

### Choices

Choice (4) Response

a.

4.8

b.

5.7

c.

2

d.

0

## Question number: 46

» Kinematics » Motion in a Straight Line

MCQ▾

### Question

If t 1 be the time taken by a body to clear the top of a building and be the time spent in air, then t 2: t 1 will be -

### Choices

Choice (4) Response

a.

2: 1

b.

1: 1

c.

1: 2

d.

1: 4

## Question number: 47

» Kinematics » Motion in a Straight Line

Assertion-Reason▾

### Assertion (Ꭺ)

A cyclist is cycling on rough horizontal circular track with increasing speed. Then the frictional force on cycle is always directed towards center of the circular track.

### Reason (Ꭱ)

For a particle moving in a circle, radial component of net force should be directed towards center. You have to select the correct choice.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

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