forces Flashcards
1
Q
what is a force?
A
- a pull, push or twist
2
Q
what is a newton meter?
A
- a piece of equipment that is used to measure weight in Newtons
3
Q
what is a streamlined object?
A
- an object that is shaped to reduce resistance from air or water
4
Q
what does it mean if an object had unbalanced forces?
A
- it means that one force is pushing or pulling on the object more than the other
5
Q
what is air resistance?
A
- the force on an object moving through the air causing to to slow down or float
6
Q
what does it mean if an object has balanced forces?
A
- the forces acting on it are equal
7
Q
what is drag force?
A
- the force slowing an object that is moving through the air or water down
8
Q
what is driving force?
A
- the force that is pushing or pulling something
9
Q
what is equilibrium?
A
- balanced [force]
10
Q
what is a field (not the farm type)?
A
- a region where something feels a force
11
Q
what is friction?
A
- the force that resists movement between 2 surfaces
12
Q
what is gravity?
A
- the force pulling everything down to the centre of the earth
13
Q
how do you calculate speed?
A
- distance / time
14
Q
how do you calculate time?
A
- distance / speed
15
Q
how do you calculate distance?
A
- speed x time
16
Q
what is weight?
A
- the amount of gravity acting on you
17
Q
what is mass?
A
- how much ‘stuff’ there is in you
18
Q
what is magnetic force?
A
- the force between 2 magnets
19
Q
what is a Newton?
A
- a measurement of weight
20
Q
what is a reaction?
A
- the support force provided by a solid surface
21
Q
what are resistive forces?
A
- any force that slows down a moving object
22
Q
what is water resistance?
A
- the force that slows down objects moving in the water
23
Q
what is Hooke’s law?
A
- the fact that if you double the force on an object the extension will double
24
Q
what is elastic limit?
A
- the point where a spring will not return to its original length when the force is removed
25
what does it mean if something 'deforms'?
- it changes shape
26
what is tension?
- a stretching force
27
what do you measure weight in?
- newtons
28
what is lubrication?
- a substance that reduces friction between surfaces when they rub together
29
what is electrostatic force?
- the force acting between 2 charged objects
30
what do you do when you compress something?
- squish it into a smaller space
