a concept map on 'Types of forces'.
11. Short Answer Questions.
1. Why is it preferable to carry shoulder bags
that have broad straps?
2. What are the effects of force?
3. Differentiate between contact and non-
contact forces
4. If the pressure exerted by an object on an
area of 20 m is 20 Pa, what will be the
force applied by the object?
Answers
Answer:
1) broad shoulders straps provide large surface area . so the pressure extorted by the bag on shoulders is less and carrying the bag easier
2) A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate. When there’s the interaction between two objects they exert a force on each other, these exerted forces are equal in size but opposite in direction.
3) a) contact forces=A contact force is any force that requires contact to occur.
b)non contact forces=A non-contact force is a force which acts on an object without coming physically in contact with it.
c) contact forces =There is no field linked with the contact force.
d) non contact forces=There is always a field linked with non-contact force.
4) bhai last wala nahi pata sorry bhai