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