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