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