# NEET Physics: Questions 161 - 163 of 2142

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## Question number: 161

MCQ▾

### Question

A projectile can have the same range R for two angles of projections. If t1 and t2 be the times of flight in two cases, then choose the incorrect relations –

### Choices

Choice (4) Response

a.

t 1 t 2

b.

t 1 t 2 t 1 t 2

c.

t 1 t 2

d.

t 1 t 2

## Question number: 162

MCQ▾

### Question

The angular displacement of a particle is given by where co0 and a are constant and ∞0 = 1 rad/sec, α = 1.5 rad/sec2. The angular velocity at time, t = 2 sec will be (in rad/sec) –

### Choices

Choice (4) Response

a.

5

b.

1

c.

3

d.

4

## Question number: 163

Assertion-Reason▾

### Assertion (Ꭺ)

A man projects a stone with speed u at some angle. He again projects a stone with same speed such that time of flight now is different. The horizontal ranges in both the cases may be same. (Neglect air friction)

### Reason (Ꭱ)

The horizontal range is same for two projectiles projected with same speed if one is projected at an angle 6 with the horizontal and other is projected at

an angle (90° - 6) with the horizontal. (Neglect air friction)

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

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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