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class-4-Work, Force and Energy-1 1 / 20 In which of the following situations no work is done ? A spaceship moves at constant velocity 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 2 / 20 Air pressure is measured with a(n) Thermometer Psychrometer Barometer Anemometer 3 / 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 Wheel, axle and gears Gears Lever and gears 4 / 20 Why we sprinkle talcum powder on a carom board? To reduce muscular energy To reduce frictional force To reduce elastic force To reduce gravitational force 5 / 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 6 / 20 What happens to the total energy of a moving object if all the applied forces are conserved? It increases It decreases The velocity is required to answer this question It remains constant 7 / 20 The works by using fuel derived from living and dead biological organisms. Solar Energy Hydroelectric Wind Energy Biofuel 8 / 20 When we throw a ball into the air, it falls back. The force responsible for this is: Muscular force Gravitational force Friction force Mechanical force 9 / 20 As defined in physics, work is done: A and C both When an object is stationary When an object stops When an object moves 10 / 20 If the resultant force acting on a body of constant mass is zero, the body's momentum is: Constant Increasing Decreasing Always zero 11 / 20 Mark the action in which work is being done: A vehicle warming up its motor A man trying to open the door A computer running a program Carrying a rucksack to school 12 / 20 Electricity traveling through a wire is an example of Earth's gravitational pull on an object Energy flowing through the water cycle Energy being transferred from place to place A force applied by a simple machine 13 / 20 Choose the wrong statement among followings All of the above statements are incorrect Acoustics is the science and technology of energy The loudness of sound is measured in decibels (Db) Sounds vary in three ways : volume (loud or soft), pitch (high or low), and timbre (quality) 14 / 20 A ________ jet travels faster than sound. Supersonic Aircraft Fighter planes All of the above 15 / 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 Kinetic energy, potential energy and work done by the body's weight Potential energy and the work done by the force that moves the body Mechanical and kinetic energies 16 / 20 Look at the lever below. Which object has the similar working principle as the above leves. D A C B 17 / 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 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 2 1 and 3 both 1 and 2 both 19 / 20 In which of these activities, the sense of hearing is least important? D C B A 20 / 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 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
Air pressure is measured with a(n)
3 / 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?
4 / 20
Why we sprinkle talcum powder on a carom board?
5 / 20
The following is a diagram of a simple electromagnet.
How could this electromagnet be made stronger ?
6 / 20
What happens to the total energy of a moving object if all the applied forces are conserved?
7 / 20
The works by using fuel derived from living and dead biological organisms.
8 / 20
When we throw a ball into the air, it falls back. The force responsible for this is:
9 / 20
As defined in physics, work is done:
10 / 20
If the resultant force acting on a body of constant mass is zero, the body's momentum is:
11 / 20
Mark the action in which work is being done:
12 / 20
Electricity traveling through a wire is an example of
13 / 20
Choose the wrong statement among followings
14 / 20
A ________ jet travels faster than sound.
15 / 20
While walking, some or all of the following types of energy and work are involved:
16 / 20
Look at the lever below.
Which object has the similar working principle as the above leves.
17 / 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.
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
In which of these activities, the sense of hearing is least important?
20 / 20
Rahul is applying force on a moving object in the same direction, the speed of the object:
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 moving air and moving water does not possess energy That wind and flowing water possess energy That only wind possesses energy That tap and wind blown passess energy 2 / 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 3 / 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 4 / 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 5 / 10 Which of the following gadget is used to measure temperature? Measuring jar Stop watch Thermometer Scale 6 / 10 Which of these contain(s) an electromagnet ? Compass Headphones Electric stove Lamp 7 / 10 Which of the following is NOT an SI unit of measure ? Newton Joule Watt Hertz 8 / 10 What is Nuclear Energy ? Energy that travels in waves Energy that is from solar panels The kinetic energy of moving electrons Energy that is locked in the nucleus of an atom 9 / 10 As you go up a mountain top, your weight : Increases slightly Increases sharply Decreases slightly Remains exactly the same 10 / 10 To measure the weight of milk, which of the following units can be used ? Milligram Fahrenheit Seconds Millilitre 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
A calorimeter is used for :
4 / 10
The mechanical energy of a freely falling object is the difference
5 / 10
Which of the following gadget is used to measure temperature?
6 / 10
Which of these contain(s) an electromagnet ?
7 / 10
Which of the following is NOT an SI unit of measure ?
8 / 10
What is Nuclear Energy ?
9 / 10
As you go up a mountain top, your weight :
10 / 10
To measure the weight of milk, which of the following units can be used ?
The average score is 35%
