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