Forces Flashcards
1
Q
Describe how a newton balance is used
A
A force is applied to the hook. This causes the spring to stretch and therefore moves the pointer to a value on the scale
2
Q
Define mass
A
the quantity of matter forming an object
3
Q
Define weight
A
the force of an object due to gravity. it is measured in newtons
4
Q
what is the value of gravity in the earths surface?
A
9.8Nkg^-1
5
Q
Define friction
A
Friction is a force which always opposes the direction of motion
6
Q
Friction can be useful when
A
parachuting to slow down
7
Q
How do you increase friction?
A
Increase surface area or make surfaces rough
8
Q
How do you decrease friction?
A
Put a fluid in between 2 surfaces
9
Q
On an aircraft facing the right, what forces act upon it?
A
⬇️weight
⬅️drag
➡️thrust
⬆️lift
10
Q
Define work done
A
the product of force and distance
