Science Revision Forces Flashcards
1
Q
If a car is going at 20 mph north and another car is going 20 mph south, what is the relative speed?
A
40 mph
2
Q
What unit is forces measured in?
A
Newtons
3
Q
Forces come in…
A
Pairs
4
Q
What force pulls you down?
A
Gravity
5
Q
What forces act on a car when driving?
A
Gravity, friction and air resistance
6
Q
What force pushes you up?
A
Upthrust
7
Q
When blowing up a balloon, why is the beginning the hardest part?
A
Because the pressure on the outside is much greater than the pressure on the inside.
