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