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