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class-4-Work, Force and Energy-1 1 / 20 As defined in physics, work is done: A and C both When an object stops When an object is stationary When an object moves 2 / 20 Look at the lever below. Which object has the similar working principle as the above leves. C D B A 3 / 20 When we throw a ball into the air, it falls back. The force responsible for this is: Muscular force Gravitational force Mechanical force Friction force 4 / 20 Choose the wrong statement among followings Sounds vary in three ways : volume (loud or soft), pitch (high or low), and timbre (quality) Acoustics is the science and technology of energy All of the above statements are incorrect The loudness of sound is measured in decibels (Db) 5 / 20 Air pressure is measured with a(n) Anemometer Psychrometer Thermometer Barometer 6 / 20 Why we sprinkle talcum powder on a carom board? To reduce gravitational force To reduce elastic force To reduce frictional force To reduce muscular energy 7 / 20 The following is a diagram of a simple electromagnet. How could this electromagnet be made stronger ? Use a smaller battery Add more coils of wire to the nail Reverse the poles of the magnet Remove all the coils and the nail 8 / 20 Mark the action in which work is being done: A man trying to open the door Carrying a rucksack to school A vehicle warming up its motor A computer running a program 9 / 20 A ________ jet travels faster than sound. All of the above Fighter planes Aircraft Supersonic 10 / 20 If the resultant force acting on a body of constant mass is zero, the body's momentum is: Increasing Constant Always zero Decreasing 11 / 20 Rahul is applying force on a moving object in the same direction, the speed of the object: Remains the same Sometime decreases and sometime increases Decreases Increases 12 / 20 Look at the following picture carefully. First identify the picture. The machine is a combination of two simple machines. Which simple machines combine to make it? Lever and gears Gears Pulley and lever Wheel, axle and gears 13 / 20 Electricity traveling through a wire is an example of Energy being transferred from place to place A force applied by a simple machine Earth's gravitational pull on an object Energy flowing through the water cycle 14 / 20 These products of nature are limited. Resources such as coal and oil are which means that when they are gone, nature cannot make them again. It is very important to limit their use and find other resources to replace them. Nonrenewable Usable Unlimited Replaceable 15 / 20 Two girls playing table tennis. First girl hit the ball over the net and at a Point say 'T', the other girl hit it back with a lot of force. What would happen at point 'T'? 1) The force caused a change in the size of the ball. 2) The force caused a change in the direction of the ball. 3) The force caused the ball to stop moving 1 and 3 both 1 and 2 both 2 1 16 / 20 What happens to the total energy of a moving object if all the applied forces are conserved? It decreases It increases It remains constant The velocity is required to answer this question 17 / 20 While walking, some or all of the following types of energy and work are involved: Kinetic energy, potential energy and work done by the body's weight Mechanical and kinetic energies Potential energy and the work done by the force that moves the body Kinetic energy, potential energy, work done by forces excluding the body's weight and work lost through friction 18 / 20 In which of the following situations no work is done ? You push on a heavy box but cannot move it A child slides down a playground slide A spaceship moves at constant velocity You slam on the brakes and your car stops quickly 19 / 20 The works by using fuel derived from living and dead biological organisms. Wind Energy Biofuel Hydroelectric Solar Energy 20 / 20 In which of these activities, the sense of hearing is least important? C D B A Your score is The average score is 25% 0% Restart quiz
class-4-Work, Force and Energy-1
1 / 20
As defined in physics, work is done:
2 / 20
Look at the lever below.
Which object has the similar working principle as the above leves.
3 / 20
When we throw a ball into the air, it falls back. The force responsible for this is:
4 / 20
Choose the wrong statement among followings
5 / 20
Air pressure is measured with a(n)
6 / 20
Why we sprinkle talcum powder on a carom board?
7 / 20
The following is a diagram of a simple electromagnet.
How could this electromagnet be made stronger ?
8 / 20
Mark the action in which work is being done:
9 / 20
A ________ jet travels faster than sound.
10 / 20
If the resultant force acting on a body of constant mass is zero, the body's momentum is:
11 / 20
Rahul is applying force on a moving object in the same direction, the speed of the object:
12 / 20
Look at the following picture carefully. First identify the picture. The machine is a combination of two simple machines. Which simple machines combine to make it?
13 / 20
Electricity traveling through a wire is an example of
14 / 20
These products of nature are limited. Resources such as coal and oil are which means that when they are gone, nature cannot make them again. It is very important to limit their use and find other resources to replace them.
15 / 20
Two girls playing table tennis. First girl hit the ball over the net and at a Point say 'T', the other girl hit it back with a lot of force. What would happen at point 'T'?
1) The force caused a change in the size of the ball. 2) The force caused a change in the direction of the ball. 3) The force caused the ball to stop moving
16 / 20
What happens to the total energy of a moving object if all the applied forces are conserved?
17 / 20
While walking, some or all of the following types of energy and work are involved:
18 / 20
In which of the following situations no work is done ?
19 / 20
The works by using fuel derived from living and dead biological organisms.
20 / 20
In which of these activities, the sense of hearing is least important?
Your score is
The average score is 25%
Restart quiz
class-4-Work, Force and Energy -2 1 / 10 The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the : Coolant/moderator Reactor Cooling tower Control rod 2 / 10 Blow at a plastic toy windmill and then hold it under a tap from which water is dripping. Which of the following, this activity is trying to show ? That wind and flowing water possess energy That moving air and moving water does not possess energy That tap and wind blown passess energy That only wind possesses energy 3 / 10 Which of the following is NOT an SI unit of measure ? Watt Joule Hertz Newton 4 / 10 A calorimeter is used for : Determine the heat of a reaction None of these Store the heat from a chemical reaction Determine the heat given off/absorbed during some process 5 / 10 What is Nuclear Energy ? Energy that is locked in the nucleus of an atom Energy that travels in waves Energy that is from solar panels The kinetic energy of moving electrons 6 / 10 Which of the following gadget is used to measure temperature? Scale Measuring jar Stop watch Thermometer 7 / 10 The mechanical energy of a freely falling object is the difference None of the above Between its potential energy and its kinetic energy Between its friction energy and its potential energy Between its potential energy and its gravitational energy 8 / 10 Which of these contain(s) an electromagnet ? Lamp Headphones Compass Electric stove 9 / 10 As you go up a mountain top, your weight : Decreases slightly Increases slightly Increases sharply Remains exactly the same 10 / 10 To measure the weight of milk, which of the following units can be used ? Seconds Fahrenheit Milligram Millilitre Your score is The average score is 35% 0% Restart quiz
class-4-Work, Force and Energy -2
1 / 10
The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the :
2 / 10
Blow at a plastic toy windmill and then hold it under a tap from which water is dripping. Which of the following, this activity is trying to show ?
3 / 10
Which of the following is NOT an SI unit of measure ?
4 / 10
A calorimeter is used for :
5 / 10
What is Nuclear Energy ?
6 / 10
Which of the following gadget is used to measure temperature?
7 / 10
The mechanical energy of a freely falling object is the difference
8 / 10
Which of these contain(s) an electromagnet ?
9 / 10
As you go up a mountain top, your weight :
10 / 10
To measure the weight of milk, which of the following units can be used ?
The average score is 35%
