Call: 6302644134 | Email: skkedu9@gmail.com
class-4-Work, Force and Energy-1 1 / 20 In which of these activities, the sense of hearing is least important? B A D C 2 / 20 The works by using fuel derived from living and dead biological organisms. Biofuel Solar Energy Hydroelectric Wind Energy 3 / 20 Why we sprinkle talcum powder on a carom board? To reduce muscular energy To reduce elastic force To reduce frictional force To reduce gravitational force 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 Unlimited Replaceable 5 / 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 6 / 20 A ________ jet travels faster than sound. Supersonic Aircraft All of the above Fighter planes 7 / 20 As defined in physics, work is done: When an object moves A and C both When an object is stationary When an object stops 8 / 20 In which of the following situations no work is done ? 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 A child slides down a playground slide 9 / 20 Choose the wrong statement among followings The loudness of sound is measured in decibels (Db) All of the above statements are incorrect Acoustics is the science and technology of energy Sounds vary in three ways : volume (loud or soft), pitch (high or low), and timbre (quality) 10 / 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 remains constant It decreases It increases 11 / 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 3 both 2 1 1 and 2 both 12 / 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 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 Mechanical and kinetic energies 13 / 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 14 / 20 The following is a diagram of a simple electromagnet. How could this electromagnet be made stronger ? Use a smaller battery Remove all the coils and the nail Add more coils of wire to the nail Reverse the poles of the magnet 15 / 20 Electricity traveling through a wire is an example of Energy being transferred from place to place Energy flowing through the water cycle Earth's gravitational pull on an object A force applied by a simple machine 16 / 20 Rahul is applying force on a moving object in the same direction, the speed of the object: Sometime decreases and sometime increases Remains the same Increases Decreases 17 / 20 Mark the action in which work is being done: A computer running a program Carrying a rucksack to school A man trying to open the door A vehicle warming up its motor 18 / 20 If the resultant force acting on a body of constant mass is zero, the body's momentum is: Decreasing Increasing Constant Always zero 19 / 20 Air pressure is measured with a(n) Psychrometer Thermometer Anemometer Barometer 20 / 20 Look at the lever below. Which object has the similar working principle as the above leves. D B A C Your score is The average score is 25% 0% Restart quiz
class-4-Work, Force and Energy-1
1 / 20
In which of these activities, the sense of hearing is least important?
2 / 20
The works by using fuel derived from living and dead biological organisms.
3 / 20
Why we sprinkle talcum powder on a carom board?
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
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?
6 / 20
A ________ jet travels faster than sound.
7 / 20
As defined in physics, work is done:
8 / 20
In which of the following situations no work is done ?
9 / 20
Choose the wrong statement among followings
10 / 20
What happens to the total energy of a moving object if all the applied forces are conserved?
11 / 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
12 / 20
While walking, some or all of the following types of energy and work are involved:
13 / 20
When we throw a ball into the air, it falls back. The force responsible for this is:
14 / 20
The following is a diagram of a simple electromagnet.
How could this electromagnet be made stronger ?
15 / 20
Electricity traveling through a wire is an example of
16 / 20
Rahul is applying force on a moving object in the same direction, the speed of the object:
17 / 20
Mark the action in which work is being done:
18 / 20
If the resultant force acting on a body of constant mass is zero, the body's momentum is:
19 / 20
Air pressure is measured with a(n)
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 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 wind and flowing water possess energy That only wind possesses energy That tap and wind blown passess energy 2 / 10 As you go up a mountain top, your weight : Increases sharply Increases slightly Remains exactly the same Decreases slightly 3 / 10 Which of the following gadget is used to measure temperature? Measuring jar Stop watch Thermometer Scale 4 / 10 Which of these contain(s) an electromagnet ? Lamp Headphones Electric stove Compass 5 / 10 A calorimeter is used for : Store the heat from a chemical reaction None of these Determine the heat given off/absorbed during some process Determine the heat of a reaction 6 / 10 Which of the following is NOT an SI unit of measure ? Joule Watt Newton Hertz 7 / 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 gravitational energy None of the above Between its potential energy and its kinetic energy 8 / 10 What is Nuclear Energy ? Energy that travels in waves Energy that is locked in the nucleus of an atom The kinetic energy of moving electrons Energy that is from solar panels 9 / 10 The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the : Cooling tower Control rod Reactor Coolant/moderator 10 / 10 To measure the weight of milk, which of the following units can be used ? Seconds Milligram Millilitre Fahrenheit 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
As you go up a mountain top, your weight :
3 / 10
Which of the following gadget is used to measure temperature?
4 / 10
Which of these contain(s) an electromagnet ?
5 / 10
A calorimeter is used for :
6 / 10
Which of the following is NOT an SI unit of measure ?
7 / 10
The mechanical energy of a freely falling object is the difference
8 / 10
What is Nuclear Energy ?
9 / 10
The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the :
10 / 10
To measure the weight of milk, which of the following units can be used ?
The average score is 35%
