Work
Work: Overview
This topic introduces us to the definition of work done by an object. We will learn how to express the work done in terms of force and displacement by an object. It also covers solved examples for a better understanding of the concept.
Important Questions on Work
Can work done be positive, negative and zero? Explain.
What is work done? What are the factors affecting work done? Also explain about positive, negative and zero work done.
A pair of bullocks exerts a force of on a plough. The field being ploughed is long. How much work is done in ploughing the length of the field?
In case of negative work the angle between the force and displacement is
In case of negative work the angle between the force and displacement is
Which of the following is the common adaptation used by all animals in the picture"
Many birds are seen flocking to the water bodies in Rajasthan and Gujarat in winters. These birds seem to come from Siberia in Russia.
This is due to a yearly activity of birds called _____.
Bats live on the ceiling of buildings and in caves. According to you, which mode of life are they adapted to?
Which of the following animals do not have webbed feet?
Buffaloes are often found cooling themselves in a pond especially during summer time. This is because of
Which of the following animal cannot survive in cold climate?
Penguins live in extremely cold regions. They have webbed feet which aid them in swimming, thick skin and a lot of fat called blubber under their skin to keep them warm in cold weather and dark coloured and tightly packed feathers which provide warmth to them.
What changes are needed to help him adapt best into this kind of an environment?
While going to the school, Harry observed a few types of plants as shown in the pictures below.
Which plant among the two is showing adaptation?
Fishes have stream-lined body to swim and survive in water.
Monkeys have long tails that help them to jump from one tree to other.
This indicates that different organisms adapt to different surroundings by
How much time is taken by a living organism to adapt to its new surroundings.
Saina brought a plant from plains. She planted it in a marshy area. Will the plant be able to survive in the new environment?
Cactus grows in desert, Lion lives in forest. So desert is a habitat for cactus and forest is a habitat for lion. What is the meaning of the word ‘habitat’?
Sushma discovered an animal that cannot fly and swim. Its body is covered with fur and it breathes through its lungs. Which of the following can possibly be the habitat of this animal?
