ICSE Worksheet for chapter-3 Work, Energy and Power class 10

ICSE Worksheet for chapter-3 Work, Energy and Power class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of ICSE Board Worksheet for Class 10 Physics . Students of Class 10 Physics can get a free Worksheet for Class 10 Physics in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Physics in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Physics Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

If any students need to take the online test to check their concepts or undertstanding then they can visit Physics Quiz for Class 10 .

Summary

• Work, Energy, Power and their relation with force, Definitions & Units
• Different types of energy, Mechanical energy, Kinetic energy, Potential Energy

Section 1 - Objective

Q1. The work done by all the forces (external & internal) on a system equals to change in

1. Total Energy
2. kinetic energy
3. Potential Energy
4. Not

Q2. Work done on a body is a …………. quantity

1. Scalar
2. Vector
3. Both a & b
4. Not

Q3. If the angle between force and displacement is 0 ^o , then work done is

1. 0
2. F.s
3. F/s
4. Not

Q4. The work done is said to be negative if force and displacement are in ________ direction A

1. same
2. opposite
3. neither a nor b
4. Not

Q5. A ball of mass 200g falls from a height of 5m. What will be its kinetic energy when it just reaches the ground?

1. 100 J
2. 10 J
3. 9.8 J
4. 98 J

Q6. A body of mass 50kg has a momentum of 3000 Kg.m/s. Calculate its Kinetic energy and velocity.

1. 90000J & 60m/s
2. 900J & 60m/s
3. 90000J & 6m/s
4. 6000J & 630m/s

Q7. An electric heater of power 3 kw is used for 10 h, how much energy does it consume?

1. 300 KWh
2. 1.08 x 10 ⁸ J
3. both a & b
4. 30 erg

Q8. 6.4kJ of energy causes a displacement of 64m in a body in the direction of force in 2.5sec. Calculate its power

1. 100Hp
2. 123Hp
3. 8.6 Hp
4. 3.4 Hp

Q9. A block of mass 5 Kg slides down on an incline of inclination 30 ⁰ & length 10 m. Find the work done by the force of gravity

1. 245
2. 490 J
3. 0 J
4. 300 J

Q10. When mass and velocity of the body are doubled then its K.E will ……….

1. increase by 8 times
2. decrease by 8times
3. Increase by 4 times
4. remain same

Section- II Subjective

Q1. Define the following

1. 1 Joule
2. Power
3. Gravitational Potential energy
4. Mechanical energy

Q2. State the units of the following

1. Work
2. Energy
3. Power

Q3. Calculate the K.E of mass 0.1 Kg and momentum 20 Kg.m/s

Q4. A porter lifts a suitcase weighting 20 Kg from the platform and puts it on his head 2 m above the platform. Calculate the work done by the porter on the suitcase.

Q5. An elevator weighting 500 Kg is to be lifted up at a constant velocity of 0.2 m/s. What will be the minimum horsepower of the motor to be used?

Q6. What is the main energy transformation that occurs in:

1. Photosynthesis in green leaves
2. Charging of a battery

Q7. (i) Define one kilowatt hour. How is it related to joule?

(ii) How can the work done be measured if the force is applied at an angle to the direction of displacement?

Q8. An object of mass ‘m’ is allowed to fall freely from point A. at a height h above the ground Calculate the total mechanical energy of the object at

1. point A (topmost point)
2. point C (lowest point)
3. point B(between A and C
4. State the law which is verified by your calculations in parts (i), (ii), and (iii).

Solutions

Objective Problems

1. 2
2. 1
3. 2
4. 2
5. 3
6. 1
7. 2
8. 4
9. 1