Section 1 Flashcards
1
Q
where is tension found?
A
in a rope
2
Q
friction is found between road surfaces which are…
A
slipping past each other
3
Q
what is friction?
A
a force that opposes motion
4
Q
how to investigate motion
A
- toy car on a ramp
- light gate
5
Q
describe how objects reach terminal velocity
A
- first set off= much more force accelerating them than slowing them down
- as velocity increases, resistance increases
- acceleration gradually reduces until the resistance force is equal ti the accelerating force§
6
Q
downwards force on skydiver
A
weight
7
Q
upwards force on skydiver
A
resistance
8
Q
how to investigate falling objects
A
- sycamore seeds
- measure mass and area
- time how long they take to reach the ground
9
Q
a bigger force means a…
A
greater acceleration or deceleration
10
Q
a bigger mass means a…
A
smaller acceleration
11
Q
unbalanced force=
A
resultant force
12
Q
Newton’s third law
A
if object A exerts a force on object B, then object B exerts the exact OPPOSITE force on object A
13
Q
vectors
A
have size and direction
14
Q
scalar quantaties
A
have only size
15
Q
vector quantaties:
A
- force
- velocity
- displacement
- acceleration
- momentum
