FORCE Flashcards
(20 cards)
What is force?
The push or pull of an object is called force
Depending on the application forces can be classified as?
- Contact forces
2. Non contact forces
What are contact forces?
Forces which act on bodies by making actual contact
Give examples of contact force
Muscular force
Force of friction
Force of tension
Force of reaction
Give examples of non contact force?
Gravitational force
Magnetic force
Electrostatic force
What is electrostatic force?
The force between two magnetic poles at a distance
Is the gravitational force always attractive?
Yes
Is the magnetic force always attractive?
Magnetic force can be attractive or repulsive
Is the electrostatic force always attractive?
NO. ELECTROSTATIC FORCE CAN BE ATTRACTIVE OR REPULSIVE
Can a force change the mass of a body on which it is applied?
No
Can we see force?
No
Can we feel force?
Yes
What are the two important components of force?
Magnitude
Direction
The S I unit of force is?
newton(N)
When two forces are acting on a body in the same direction, the forces get _____________ to give a _______________.
Added
Resultant force
What is friction?
Friction is a force that opposes the relative motion between two surfaces in contact with each other
How is the word friction derived?
From the Latin word “fricare” which means to rub
What are the effects of friction?
- Friction opposes motion
- Friction acts in the direction opposite to that of motion
- friction produces heat
- friction causes wear and tear
How does friction arise?
because of the irregular projection between the two surfaces in contact
Which are the three factors that affect friction ?
Smoothness of the surface
The nature of the medium in which the body moves
Weight of the moving body on the surface
