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