8 force is not with you shut up

Question 1

What is force

Answer 1

Pull or push upon on object

Question 2

What are types of force

Answer 2

Gravitational force
Normal force
Weight
Elastic force
Buoyant force
Frictional force

Question 3

What is gravitational force

Answer 3

Force that points towards the centre of the Earth
Causes all objects thrown upwards to fall back to Earth

Question 4

What is normal force

Answer 4

Force produced when an object is in contact with a surface
(Perpendicular to object)

Question 5

What is weight

Answer 5

Gravitational force acting on it

Question 6

What is elastic force

Answer 6

When a material is stretched or compressed

Question 7

What is buoyant force

Answer 7

Thrust force acting on an object that is floating on the surface of a fluid

Question 8

What is frictional force

Answer 8

Force that resists movement between two surfaces that are in contact with each other

Question 9

What is the direction of frictional force

Answer 9

Opposite direction of motion

Question 10

What quantity is force

Answer 10

Vector quantity, has magnitude & direction

Question 11

What is magnitude

Answer 11

Quantity or value of a measurement

Question 12

What is the point of application

Answer 12

Exact location at which a force is applied to a body

Question 13

How to measure force & what is the principle used

Answer 13

Spring balance
Spring extension - Magnitude is obtained by reading the scale on the balance

Question 14

What is the SI unit of force

Answer 14

newton (N)

Question 15

On Earth, I N -> ?

Answer 15

100g
or 1kg = 10N

Question 16

What is Newton’s third law

Answer 16

For every action force, there is a reaction force of the same magnitude but in the opposite direction

Question 17

Explain action-reaction pair of object on a table

Answer 17

Book on table experiences gravitational force = weight
A reaction called normal force exists in the opposite direction

Book remains on table because magnitude of the weight (action) = normal force (reaction)

Question 18

Explain the action-reaction pair of an object that floats on water

Answer 18

Object on water experiences gravitational force = weight
A reaction called buoyant force exists in the opposite direction

Object floats on water because magnitude of weight (action) = buoyant force (reaction)

Question 19

Explain the action-reaction pair between two trolleys in contact with each other and launched with a spring mechanism

Answer 19

Trolley 1 w/ spring: Exert elastic force on trolley 2 (action)
Trolley 2: Exert elastic force of same magnitude in the opposite direction (reaction)
When two trolleys initially touching each other are launched, they will move at same distance but in opposite direction