Force, Energy & Work Test 1

Result

Force, Energy & Work Test 1

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Question 1
1 / -0

If Ravi is able to move the table through a distance, then ____ is said to be done.

A
work

B
force

C
energy

D
muscles

Solution

Work is said to be done only when a push or pull moves something that has weight, through a distance.
Question 2
1 / -0

Match the following devices in Column - I with their energy transformations Column - II correctly.

A
p−i,q−iv,r−v,s−iii,t−ii

B
p−v, q−iii, r−i, s−ii, t−iv

C
p−iii,q−iv,r−v,s−i,t−ii

D
p−iv, q−iii, r−i, s−v, t−ii

Solution

The following is the correct combination: Electric fan - Electrical to mechanical Electric bulb - Electrical to light Petrol engine - Chemical to Mechanical Television - Electrical to light and sound. Battery - Chemical to electrical.
Question 3
1 / -0

When we throw a ball into air, it falls back. The force responsible for this is

A
Muscular force.

B
Gravitational force.

C
Mechanical force.

D
none of these

Solution

The gravitational force of the earth pulls objects towards it.
Question 4
1 / -0

X enables work to be done. There are many forms of X. What is X?

A
Energy

B
The Sun

C
Heat

D
Sound

Solution

The capacity to do work is called energy. Energy is available in different forms such as heat energy, light energy etc.
Question 5
1 / -0

In a battery cell, energy is stored in the form of

A
electrical energy.

B
muscular energy.

C
chemical energy.

D
solar energy.

Solution

In a battery cell, energy stored is in the form of chemical energy.
Question 6
1 / -0

Which of the following activities would need energy the most?

A
Riding a bicycle up a hill

B
Walking

C
Riding a bicycle on a level ground

D
Doing homework

Solution

Riding a bicycle up a hill need more energy.
Question 7
1 / -0

Work is done when you

A
kick a foot ball.

B
hammer a nail.

C
push a door.

D
All of the above.

Solution

Work is said to be done when you kick a football, hammer a nail and push a door.
Question 8
1 / -0

Which of the following statements is NOT true?

A
Machines make work easy.

B
Machines increase the speed of doing work.

C
Machines change the direction of force

D
Machines produce energy.

Solution

Machines work when energy is provided to them and it does not produce energy.
Question 9
1 / -0

The capacity to do work is called

A
force

B
energy

C
machine

D
movement

Solution

The capacity to do work is called energy.
Question 10
1 / -0

In which of the following activities is force used for pulling?

A
Blowing air into a balloon

B
Cycling

C
Stretching a rubber band

D
All of the above

Solution

Stretching of a rubber band is an example of a pulling force.