Force and its effects for class 8. this ppt provides an easy way to understand force and the effects of force by giving various daily life examples. It consists of animations through which students can easily understand.
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Force and its effects
1. What do you do to make a football move?
What do you do to make a moving ball move faster?
How does a goalkeeper stops a ball?
A hockey player changes the direction of ball with a
flick of stick.
2. In all these situations either the ball is made to
move faster or is slowed down or its direction
is changed.
Now the question arises what makes all these
changes?
14. Fill in the blanks:
1. To move a loaded trolley we have to it.
2. To stretch a bow we need to it.
Tell whether objects are pushed or pulled in the
following cases:
Raising a flag
Pressing a switch
Knocking a nail
15. What is the action of force on objects when
1.A lump of dough is pressed down with hands.
2. Pulling the free ends of a
rubber suspended from a hook.
3. Hammering a piece of iron.
16. Give two examples each of situations in which
you push or pull to change the state of motion
of objects.
Give two examples of situations in which
applied force causes a change in the shape of
an object.