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