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