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