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class-4-Work, Force and Energy-1 1 / 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 remains constant It decreases 2 / 20 Air pressure is measured with a(n) Anemometer Psychrometer Barometer Thermometer 3 / 20 In which of these activities, the sense of hearing is least important? A C D B 4 / 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. Usable Nonrenewable Replaceable Unlimited 5 / 20 Mark the action in which work is being done: A computer running a program Carrying a rucksack to school A vehicle warming up its motor A man trying to open the door 6 / 20 While walking, some or all of the following types of energy and work are involved: 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 Mechanical and kinetic energies Kinetic energy, potential energy and work done by the body's weight 7 / 20 Choose the wrong statement among followings Acoustics is the science and technology of energy The loudness of sound is measured in decibels (Db) 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 Rahul is applying force on a moving object in the same direction, the speed of the object: Sometime decreases and sometime increases Decreases Increases Remains the same 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 1 1 and 3 both 2 10 / 20 When we throw a ball into the air, it falls back. The force responsible for this is: Muscular force Friction force Mechanical force Gravitational force 11 / 20 As defined in physics, work is done: A and C both When an object moves When an object is stationary When an object stops 12 / 20 Why we sprinkle talcum powder on a carom board? To reduce gravitational force To reduce muscular energy To reduce elastic force To reduce frictional force 13 / 20 A ________ jet travels faster than sound. Supersonic All of the above Fighter planes Aircraft 14 / 20 If the resultant force acting on a body of constant mass is zero, the body's momentum is: Increasing Constant Always zero Decreasing 15 / 20 Look at the lever below. Which object has the similar working principle as the above leves. D B A C 16 / 20 The following is a diagram of a simple electromagnet. How could this electromagnet be made stronger ? Use a smaller battery Reverse the poles of the magnet Remove all the coils and the nail Add more coils of wire to the nail 17 / 20 Electricity traveling through a wire is an example of Earth's gravitational pull on an object A force applied by a simple machine Energy flowing through the water cycle Energy being transferred from place to place 18 / 20 The works by using fuel derived from living and dead biological organisms. Biofuel Hydroelectric Wind Energy Solar Energy 19 / 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 Pulley and lever Lever and gears Gears 20 / 20 In which of the following situations no work is done ? A child slides down a playground slide You slam on the brakes and your car stops quickly You push on a heavy box but cannot move it A spaceship moves at constant velocity Your score is The average score is 25% 0% Restart quiz
class-4-Work, Force and Energy-1
1 / 20
What happens to the total energy of a moving object if all the applied forces are conserved?
2 / 20
Air pressure is measured with a(n)
3 / 20
In which of these activities, the sense of hearing is least important?
4 / 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.
5 / 20
Mark the action in which work is being done:
6 / 20
While walking, some or all of the following types of energy and work are involved:
7 / 20
Choose the wrong statement among followings
8 / 20
Rahul is applying force on a moving object in the same direction, the speed of the object:
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
When we throw a ball into the air, it falls back. The force responsible for this is:
11 / 20
As defined in physics, work is done:
12 / 20
Why we sprinkle talcum powder on a carom board?
13 / 20
A ________ jet travels faster than sound.
14 / 20
If the resultant force acting on a body of constant mass is zero, the body's momentum is:
15 / 20
Look at the lever below.
Which object has the similar working principle as the above leves.
16 / 20
The following is a diagram of a simple electromagnet.
How could this electromagnet be made stronger ?
17 / 20
Electricity traveling through a wire is an example of
18 / 20
The works by using fuel derived from living and dead biological organisms.
19 / 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?
20 / 20
In which of the following situations no work is done ?
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 ? Newton Hertz Joule Watt 2 / 10 What is Nuclear Energy ? Energy that is locked in the nucleus of an atom Energy that travels in waves The kinetic energy of moving electrons Energy that is from solar panels 3 / 10 To measure the weight of milk, which of the following units can be used ? Millilitre Fahrenheit Seconds Milligram 4 / 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 moving air and moving water does not possess energy That tap and wind blown passess energy That only wind possesses energy 5 / 10 The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the : Coolant/moderator Cooling tower Reactor Control rod 6 / 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 7 / 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 8 / 10 Which of these contain(s) an electromagnet ? Lamp Headphones Compass Electric stove 9 / 10 Which of the following gadget is used to measure temperature? Stop watch Measuring jar Thermometer Scale 10 / 10 As you go up a mountain top, your weight : Remains exactly the same Increases sharply Increases slightly Decreases slightly 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
What is Nuclear Energy ?
3 / 10
To measure the weight of milk, which of the following units can be used ?
4 / 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 ?
5 / 10
The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the :
6 / 10
The mechanical energy of a freely falling object is the difference
7 / 10
A calorimeter is used for :
8 / 10
Which of these contain(s) an electromagnet ?
9 / 10
Which of the following gadget is used to measure temperature?
10 / 10
As you go up a mountain top, your weight :
The average score is 35%
