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