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