Question 1

A fast-moving small car collided with a large loaded truck. Which of the following statements concerning the force experienced by the car and the truck is correct?

Accepted Answer

The same force was experienced by the truck and the small car.

Answer

The truck experienced the greater force.

Answer

It’s impossible to tell since the mass and the acceleration were not given.

Answer

The small car experienced the greater force.

Question 2

A book is placed on a table. If the book exerts a force of 15 N on the table, how much force does the table exert on the book?

Accepted Answer

15N

Answer

3N

Answer

9.8N

Answer

0N

Question 3

If a man is pushing the cart to the left, what is the direction of the force exerted by the cart on the man?

Accepted Answer

rightward

Answer

upward

Answer

downward

Answer

leftward

Question 4

In Newton’s third law of motion, the equal and opposite forces do not cancel out each other out. What is the reason for this?

Accepted Answer

The forces have equal magnitudes.

Answer

The forces act on different systems.

Answer

The two forces are in the same direction.

Answer

The two forces act in parallel directions.

Question 5

Which of the following is important for the propagation of sound?

Accepted Answer

medium

Answer

space

Answer

distance

Answer

light

Question 6

Why does sound travel faster in wood than in water?

Accepted Answer

The molecules in wood are tightly packed against each other, hence sound can be propagated easily.

Answer

The molecules in wood are bigger compared to the molecules in water.

Answer

There are more molecules in wood than in water.

Answer

The molecules in water collide randomly, hence sound can easily be transmitted.

Question 7

The speed of sound in steel is 5960 m/s while its speed in air is 331 m/s. How fast does sound travel in steel than in air?

Accepted Answer

18 times that in air

Answer

22 times that in air

Answer

25 times that in air

Answer

20 times that in air

Question 8

Why does sound travel faster at high temperature?

Accepted Answer

Because air molecules have more energy and vibrate faster at a higher temperature

Answer

Because there are more molecules in the hotter surrounding.

Answer

Because the molecules of air become tightly packed.

Answer

Because sound is louder at higher temperature.

Question 9

Which of the following has the greatest effect on sound in air?

Accepted Answer

temperature

Answer

amplitude

Answer

frequency

Answer

wavelength

Question 10

What is the natural tendency of an object to remain in a state of rest or remain in uniform motion in a straight line?

Accepted Answer

Inertia

Answer

Velocity

Answer

Acceleration

Answer

Interaction

Question 11

The acceleration is _____________________ to the mass of the object. It means, as the mass increases the acceleration decreases.

Accepted Answer

inversely proportional

Answer

very proportional

Answer

not proportional

Answer

directly proportional

Question 12

A boy pushed the table with 12 N. The table has a mass of 4 kg. What will be the acceleration of the table? Note that F = ma.

Accepted Answer

3 m/s2

Answer

48 m/s2

Answer

3 kg

Answer

8 m/s2

Question 13

How much force is needed to accelerate the 2.5 kg ball at 4.5 m/s2. Note that F = ma.

Accepted Answer

11.25 N

Answer

2 N

Answer

11.25 m/s²

Answer

1.8 N

Question 14

Which of the following is NOT a cause of a net force?

Accepted Answer

An object will continuously move at a constant velocity.

Answer

An object at rest will start moving.

Answer

An object in motion will eventually stop.

Answer

There is a change in direction of a moving object.

Question 15

Which situation shows the greatest potential energy?

Accepted Answer

A motorbike parked at the top of the hill.

Answer

A ball rolling down a hill.

Answer

A boy running down the hill.

Answer

A basketball falls freely from a 20-storey building.

Question 16

Which of the following describes kinetic energy?

Accepted Answer

Energy possessed by an object due to its motion.

Answer

The energy an object created.

Answer

The energy stored within an object

Answer

The energy available to a stationary object.

Question 17

Which point in the given illustration has the most potential energy?

Accepted Answer

Point. W

Answer

Point. Z

Answer

Point. Y

Answer

Point. X

Question 18

Gravitational potential energy depends on the _____, ______ and ______ of the object.

Accepted Answer

mass, height, and gravitational strength

Answer

friction, resistance, and movement

Answer

height, friction, and gravitational strength

Answer

mass, height, and movement

Question 19

A ball weighing145 grams was thrown with a velocity of 20 m/s. How much kinetic energy does the ball have? Note that: KE = 1/2mv².

Accepted Answer

29J

Answer

29 000J

Answer

1.45J

Answer

30J

Question 20

Which color of light is not dispersed when white light passes through a prism?

Accepted Answer

pink

Answer

green

Answer

orange

Answer

red

Question 21

Why is a red light at the top while violet light is at the bottom of the color spectrum?

Accepted Answer

Red light has a longer wavelength and violet light has a shorter wavelength.

Answer

Red light has a lower frequency and energy than violet light.

Answer

Violet light has a longer wavelength and red light has a shorter wavelength.

Answer

Red light travels faster than violet light.

Question 22

If all the colors of white light are reflected from the object, how does the object appear?

Accepted Answer

The object appears white

Answer

The object appears black

Answer

The object appears pink

Answer

The object appears blue

Question 23

How do the colors of light arrange in increasing energy?

Accepted Answer

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Answer

Red, Blue, Indigo, Orange, Yellow, Green, Violet

Answer

Red, Green, Blue, Indigo, Orange, Yellow, Violet

Answer

Red, Yellow, Green, Blue, Indigo, Orange, Violet

Question 24

What happens to the kinetic energy of atoms and molecules as the temperature becomes lower?

Accepted Answer

decreases

Answer

decreases and then increases

Answer

increases then decreases

Answer

increases

Question 25

A security guard in a mall scanned the temperature of a girl using an infrared thermometer. The registered temperature is 101 $\degree$ F. If the normal body temperature is below 37.5 $\degree$ C, what does it show? Note that $\degree$ C = ( $\degree$ F - 32) 5/9

Accepted Answer

She has a fever. Her temperature is 38.3 $\degree$ C.

Answer

She has a fever. Her temperature is 37.3 $\degree$ C.

Answer

She does not have a fever. Her temperature is 37.4 $\degree$ C .

Answer

She does not have a fever. Her temperature is 38.3 $\degree$ C.

Question 26

Which of the following statements is NOT true about heat?

Accepted Answer

Heat is the average movement of molecules in a substance.

Answer

Heat is an energy that flows from substances with fast-moving molecules to other substances with slow-moving molecules.

Answer

Heat is expressed in terms of Joules or calories.

Answer

Heat pertains to the energy transferred when there is a difference in the temperature of two bodies.

Question 27

Which of the following is NOT an effect of heat?

Accepted Answer

The rusting of the metal plate of a car

Answer

The increasing size of the metal gate

Answer

The lowering of temperature

Answer

The subliming of naphthalene balls after some time.

Question 28

How many current paths are there if four electric devices are connected in a series circuit?

Accepted Answer

one

Answer

four

Answer

two

Answer

three

Question 29

Which of the following always remains constant in a series circuit?

Accepted Answer

Current

Answer

Voltage

Answer

Resistance

Answer

Power

Question 30

Which best describes a parallel circuit?

Accepted Answer

Electricity flows along more than one pathway.

Answer

The flow of electricity comes from one source.

Answer

The flow of electricity comes from more than one source.

Answer

.Electricity flows along one pathway.

Question 31

Four resistors are connected in a circuit as shown in the figure. Calculate the total resistance of it.

Accepted Answer

47 Ω

Answer

39 Ω

Answer

52 Ω

Answer

12 Ω

Question 32

When you are at home, turning off a light usually does not turn off your TV set because .

Accepted Answer

most electrical devices at home are on parallel circuits.

Answer

they have different sources of voltage

Answer

most electrical devices at home are on series circuits

Answer

a TV set does not require electricity

Question 33

The measurement of how a device or material reduces the electrical current through it is called the __________________ .

Accepted Answer

resistance

Answer

voltage

Answer

current

Answer

fuse

Question 34

The measurement of the flow of electrons in a circuit is the ___________.

Accepted Answer

current

Answer

voltage

Answer

energy

Answer

resistance

Question 35

A negatively charged balloon is brought near an empty charged soda can that rest on a wood table. What is the charge of the soda can when it moves away from the balloon?

Accepted Answer

negatively charged

Answer

uncharged

Answer

positively charged

Answer

neutral

Question 36

Ohm’s Law states that ___________.

Accepted Answer

the current is equal to the voltage divided by the resistance.

Answer

the current is equal to the voltage times the resistance.

Answer

the resistance is equal to the voltage times the current.

Answer

the voltage is equal to the current divided by the resistance

Question 37

A switching device that interrupts the fault current and protects from short circuits or overloads current conditions.

Accepted Answer

circuit breaker

Answer

fuse

Answer

double insulation

Answer

earthing

Question 38

An electrical safety device that can protect an electric circuit from very high electric current into the power system.

Accepted Answer

fuse

Answer

circuit breaker

Answer

earthing

Answer

double insulation

Question 39

A process of transferring the sudden discharge of the electrical energy directly to the earth with the help of the low resistance wire.

Accepted Answer

earthing

Answer

circuit breaker

Answer

fuse

Answer

double insulation

Question 40

Which of the following is NOT among the effects of an electrical shock to the body?

Accepted Answer

Reduce body weight

Answer

Burn

Answer

Nerve Damage

Answer

Death

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