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class-4-Work, Force and Energy-1 1 / 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 2 / 20 Electricity traveling through a wire is an example of Earth's gravitational pull on an object Energy being transferred from place to place A force applied by a simple machine Energy flowing through the water cycle 3 / 20 The works by using fuel derived from living and dead biological organisms. Hydroelectric Biofuel Solar Energy Wind Energy 4 / 20 Choose the wrong statement among followings Acoustics is the science and technology of energy All of the above statements are incorrect 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) 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 Mechanical and kinetic energies 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 6 / 20 A ________ jet travels faster than sound. Fighter planes All of the above Supersonic Aircraft 7 / 20 In which of these activities, the sense of hearing is least important? B A C D 8 / 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 Gears Lever and gears Wheel, axle and gears 9 / 20 As defined in physics, work is done: When an object is stationary A and C both When an object stops When an object moves 10 / 20 Rahul is applying force on a moving object in the same direction, the speed of the object: Remains the same Decreases Sometime decreases and sometime increases Increases 11 / 20 If the resultant force acting on a body of constant mass is zero, the body's momentum is: Increasing Decreasing Constant Always zero 12 / 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 2 both 2 1 and 3 both 13 / 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 14 / 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 15 / 20 What happens to the total energy of a moving object if all the applied forces are conserved? It remains constant It increases The velocity is required to answer this question It decreases 16 / 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 17 / 20 Mark the action in which work is being done: A computer running a program Carrying a rucksack to school A man trying to open the door A vehicle warming up its motor 18 / 20 Look at the lever below. Which object has the similar working principle as the above leves. A C D B 19 / 20 Air pressure is measured with a(n) Anemometer Thermometer Barometer Psychrometer 20 / 20 When we throw a ball into the air, it falls back. The force responsible for this is: Gravitational force Mechanical force Muscular force Friction force 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
Electricity traveling through a wire is an example of
3 / 20
The works by using fuel derived from living and dead biological organisms.
4 / 20
Choose the wrong statement among followings
5 / 20
While walking, some or all of the following types of energy and work are involved:
6 / 20
A ________ jet travels faster than sound.
7 / 20
In which of these activities, the sense of hearing is least important?
8 / 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?
9 / 20
As defined in physics, work is done:
10 / 20
Rahul is applying force on a moving object in the same direction, the speed of the object:
11 / 20
If the resultant force acting on a body of constant mass is zero, the body's momentum is:
12 / 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
13 / 20
The following is a diagram of a simple electromagnet.
How could this electromagnet be made stronger ?
14 / 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.
15 / 20
What happens to the total energy of a moving object if all the applied forces are conserved?
16 / 20
Why we sprinkle talcum powder on a carom board?
17 / 20
Mark the action in which work is being done:
18 / 20
Look at the lever below.
Which object has the similar working principle as the above leves.
19 / 20
Air pressure is measured with a(n)
20 / 20
When we throw a ball into the air, it falls back. The force responsible for this is:
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 only wind possesses energy That wind and flowing water possess energy That moving air and moving water does not possess energy 2 / 10 Which of the following is NOT an SI unit of measure ? Watt Joule Newton Hertz 3 / 10 A calorimeter is used for : Store the heat from a chemical reaction Determine the heat given off/absorbed during some process Determine the heat of a reaction None of these 4 / 10 What is Nuclear Energy ? Energy that travels in waves The kinetic energy of moving electrons Energy that is from solar panels Energy that is locked in the nucleus of an atom 5 / 10 To measure the weight of milk, which of the following units can be used ? Millilitre Fahrenheit Seconds Milligram 6 / 10 As you go up a mountain top, your weight : Remains exactly the same Increases slightly Decreases slightly Increases sharply 7 / 10 Which of these contain(s) an electromagnet ? Compass Headphones Electric stove Lamp 8 / 10 The mechanical energy of a freely falling object is the difference Between its friction energy and its potential energy None of the above Between its potential energy and its gravitational energy Between its potential energy and its kinetic energy 9 / 10 The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the : Control rod Cooling tower Reactor Coolant/moderator 10 / 10 Which of the following gadget is used to measure temperature? Thermometer Measuring jar Scale Stop watch 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 the following is NOT an SI unit of measure ?
3 / 10
A calorimeter is used for :
4 / 10
What is Nuclear Energy ?
5 / 10
To measure the weight of milk, which of the following units can be used ?
6 / 10
As you go up a mountain top, your weight :
7 / 10
Which of these contain(s) an electromagnet ?
8 / 10
The mechanical energy of a freely falling object is the difference
9 / 10
The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the :
10 / 10
Which of the following gadget is used to measure temperature?
The average score is 35%
