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