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