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