Page 2 :
Tick (V) the activities in which work is being done., 1. A football is kicked into a goalpost in the goal., 2. A clock on the wall is not working., , pel, , , , 3. A girl is sitting on a chair and thinking about basketball., , s the capacity of a body to do work., y obtains energy from the food you eat., 2r you apply force on an object, the body, ‘gy. When you push a table, the body uses, , , , similarly, when you try to stop or slow, , : F ‘ ind es the, icycle by applying force, energy is used. we ceo, , 1 moving the branch ofa tree also has energy which helps it to move the, , lowing water too has energy that can move a sailboat., , of energy, , , , , , , , > source of all energy on the Earth. The energy present in the rays of the, led solar energy., , Plants use solar energy to prepare food in their leaves. This, food is eaten by humans and other organisms and then the, energy of the sun gets transferred to them. Solar energy can, , also be converted into electrical energy to oper, , , , fans, machines and even vehicles., , sun
Page 3 :
CONCEPT RECALL, , Friction FORCE, , ENERGY USED RTI :, Object moves, , WORK DONE, , & Tick (/) the correct option to complete each sentence,, , 1. The push that can make an object move is also called, 1 force. [| friction, Eat work,, , 2. An example of work not being done is when, , jal heat., , , , , __/a ball moves on being kicked. I a chair falls on being pushed., , 7 girl pushes a wall and it does not move. [] a window is pulled and closed,, , ®;. ae, , Sq, , c, poe © : 2 - a, rs Rare Xx, , necro — = es
Page 4 :
3. It is used when work is done., |_| Friction [| Light [Heat [-Hthergy, 4, An example of simple machine is, | |awashing machine. | V+4n axe. | | an elevator. [ Jacomputer., , 5. The form of energy that the plants use to make their foods is, |_| coal energy. [wind energy. | | water energy. [-(Solarenergy., , (1) Correct the sentences by changing the underlined word/words., st, 1. Friction is needed to inoue an object., 2. The energy contained in moving water is called LPG. hydel, , ale, 3. Aneedle is a Siete machine., , 4. me i the capacity to do work., done, 5. Work is not done when an object moves., , w Answer the following questions in one sentence., , 1. What is force?, , i), , How does your body get energy to do work?, , 3. When is work done?, 4. What is one major source of energy for the Earth?, 5. What is friction?, , o Answer the following questions in two to three sentences., 1. Can force change the direction of a moving object? Explain with a simple example., 2. List four sources of energy and their uses., , 3. Differentiate between simple and complex machines., , IGHER ORDER THINKING SKILLS, , <omal notices that during the winter season, her elder brother rubs his hands together, nany times to feel warm. Explain why the rubbing together of hands produces heat., , See cad, , AY hae
