Force Flashcards
Explain force
A force is something that causes an object to move or to change its velocity
What is friction?
A force that prevents easy movement between two objects in contact
Disadvantages of friction
Wastes energy
Slows things down
Wears away surfaces
Advantages of friction
Brakes on a bike
Walking
Driving
Picking up objects
How to reduce friction
Lubricate with oil/grease
What is weight
Force due to gravity
Measured in Newtons
What is mass
The amount of matter in an object
Unit of mass: kg/g
What is the unit of force
Newton (N)
What instrument is used to measure force
Spring balance or Newton metre
Name the scientist after which the unit of force is named after
Isaac Newton
What is Hookes Law
The extension of the Spring is directly proportional to the force that is stretching it
What is the formula to change mass into weight (N)
Mass (kg) X 10 = Weight (N)
How to convert Grams to kilogrammes
Multiply by one thousand
Name and four types of force
There are different types of force: gravity force, magnetic force, electric force and force of friction.
Explain gravity
The force that attracts and pulls things towards the earth’s surface
