Page 1 - Home Assignment

SAI INTERNTIONAL SCHOOL
Class 8
Home Assignment
Subject- Physics
Ch- Force and Pressure
Subtopic- Balanced and Unbalanced Force

1 Assertion: A car stops when brakes are applied. 1
Reason: An unbalanced force can change the direction of motion.
2 1

In Figure, two boys A and B are shown applying force on a block. If the block
moves towards the right, which one of the following statements is correct?
(a) Magnitude of force applied by A is greater than that of B.
(b) Magnitude of force applied by A is smaller than that of B.
(c) Net force on the block is towards A.
(d) Magnitude of force applied by A is equal to that of B.

3 When two forces applied on an object are equal and opposite, then these 1
forces
(a)may move the object
(b)may stop the object
(c)may move the object and also change its shape
(d)do not movethe object but may change its shape.
4 When two forces act in opposite directions, then net force acting is _______. 1

(a) sum of two forces
(b) difference between two forces
(c) both of these
(d) none of these
5 Give one example of each balanced and unbalanced force. 2
6 Give reason: 1
When we push the wall of the classroom, the wall does not move.
7 Team A Team B 5