national four physics - dynamics and space. Flashcards
1
Q
average speed is
A
the distance travelled over a long period of time
2
Q
measuring average speed experiment
A
- measure the distance between the light gates using a metre stick or measuring tape
*find the time for the object to move from one light gate ti the other using a stopwatch or electronic timer or electronic timer.
*use the equation v=d/t
3
Q
acceleration is
A
the change in speed per second per second
4
Q
the equation for acceleration is
A
a=(v-u)/t
5
Q
equal forces acting in opposite directions is called
A
balanced forces
6
Q
when forces are balanced the object
A
will remain at rest or travel in a straight line
7
Q
an object will accelerate when acted upon by
A
an unbalanced force
8
Q
the relationship between force, mass and acceleration
A
F=ma
9
Q
if it take a satellite takes 24hrs to orbite the earth
A
geostationary
10
Q
a satellite
A
reflects rays to hit it to a focal point
11
Q
higher orbit
A
longer to orbit earth
12
Q
a moon is
A
a natural satellite
