# IGCSE Physics Paper-1: Specimen Questions with Answers 144 - 147 of 149

## Question number: 144

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MCQ▾

### Question

Two persons sit on the seesaw, person B is applying force 300N and 0.5m from the pivot. Person A is applying force of 400N. Calculate the distance that person A must sit from the pivot to balance it.

Choice (4)

a.

0.52m

b.

1.5m

c.

0.37m

d.

1.0m

c.

### Explanation

Moment (Nm)

Anticlockwise moment = clockwise moment

Force

Distance (m) =

## Question number: 145

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MCQ▾

### Question

A car can accelerate to a speed of 30 m⧵s from rest in 5 seconds. What is its average acceleration?

Choice (4)

a.

0 m/s2

b.

4 m/s2

c.

6 m/s2

d.

5 m/s2

c.

### Explanation

At

a =

Here u is the initial speed (in rest)

v is the final speed = 30 m/s

t = time

Then

a = =

m/s2

## Question number: 146

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MCQ▾

### Question

6 coulombs of charge flows in the circuit. Calculate the total energy transferred.

Choice (4)

a.

120J

b.

45J

c.

60J

d.

30J

a.

### Explanation

E = energy transferred

Q = charge flow

V = potential difference (v)

E = 120J

## Question number: 147

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MCQ▾

### Question

In the given table describe the nature of a particles

Choice (4)

a.

b.

c.

d.

d.

### Explanation

• Particles are negatively charged. Charge of - particle is -1 and the mass of the particle is th of the proton.

• particles are fast and light

• They have medium penetration power.

• Ionize other atoms not strong as Rays.

• -rays are not particles they are waves or rays and they do not have mass and charge. And these rays have high penetration power.