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