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