PRACTICE WORKSHEET
(CLASS - VIII)
TOPIC – FORCE AND PRESSURE
1. When a force acts on a moving object, it can make the object
a) move faster b) slow down c) stop d) all of these
2. Name the type of forces involved in the following :
a) A horse pulling a cart _________________________
b) A moving boat coming to rest when rowing is stopped ___________________
c) A coin falling to the ground on slipping from hand ______________________
d) A sticker attached to steel almirah without glue _________________________
3. Two students fought over a lunch box, both started pulling it from opposite ends but the box didn't move from its place. What will you infer about the magnitude and direction of the forces?
4. An archer shoots an arrow in the air horizontally. However, after moving some distance, the arrow falls to the ground. Name the initial force that sets the arrow in motion. Explain why the arrow ultimately falls down.
Assertion / Reason:
For question numbers 5, two statements are given – one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the options (a),(b),(c) and (d) as given below:
a. Both A and R are true and R is the correct explanation of A.
b. Both A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. A is false but R is true.
5. Assertion: Falling of rain drops is a contact force.
Reason: Gravitational force is an example of non-contact force.
6. Shilpa is cutting fruits in the absence of her mother. She finds it difficult to cut fruits. She sharpens the cutting edge of the knife and cuts the fruits easily.
a) How does sharpening the blunt tool help in cutting the vegetable easily?
b) What value do you learn from shilpa’s action?
7. The elephant weighs 20,000 N standing.on one foot of area 1000cm2. How much pressure would it exert on the ground?
