# Physics-Motion and Force (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 21 - 25 of 34

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## Question number: 21

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

### Question

The speed-time relation of a car whose weight is 1500 kg has shown in the given graph. How much braking force has been applied at the end of 7sec. to stop the car in 2 sec?

### Choices

Choice (4) Response

a.

1200N

b.

9000N

c.

4800N

d.

2000N

## Question number: 22

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

### Question

The speeds of sound in air and sea-water are given to be 340 m/s and 1440 m/s, respectively. A ship sends a strong signal straight down and detects its echo after 1.5 s. The depth of the sea at that point is

### Choices

Choice (4) Response

a.

0.255 km

b.

2.16 km

c.

1.08 km

d.

0.51 km

## Question number: 23

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

### Question

The distance covered by a body moving along X-axis with initial velocity V and uniform acceleration ‘a’ is given by . This result is a consequence of:

### Choices

Choice (4) Response

a.

Newton’s III rd law

b.

Newton’s I st law

c.

Newton’s II nd law

d.

None of the above

## Question number: 24

» Physics » Motion and Force

MCQ▾

### Question

Why the dam of water reservoir is thick at the bottom?

### Choices

Choice (4) Response

a.

Pressure of water increase with depth

b.

Density of water increases with depth

c.

Temperature of water increase with depth

d.

Quantity of water increases with depth

## Question number: 25

» Physics » Motion and Force

MCQ▾

### Question

Two pieces of metal when immersed in a liquid have equal upthrust on them, then

### Choices

Choice (4) Response

a.

Two Pieces must have equal weights

b.

Two Pieces must have equal volumes

c.

Two pieces of metal are floating to the same depth

d.

Two Pieces must have equal densities

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