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