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