P5 Flashcards
0
Q
Name the scalar quantities
A
Speed, mass, temperature, time and length.
1
Q
What is the difference between speed and velocity?
A
Speed is just a number but velocity also has a direction.
2
Q
Name some vector quantities
A
Velocity, force, displacement, acceleration and momentum.
3
Q
What do the letters stand for in motion
A
U=initial velocity V=final velocity S=displacement/distance T=time A=acceleration.
4
Q
How do you choose the right equation?
A
Write down three things you know.
Write down what you want to find out.
Choose the equation that involves all that is written down.
Stick numbers in.
5
Q
What is newton’s third law?
A
Every reaction has an equal and opposite reaction.
6
Q
When is momentum conserved?
A
In a collision when no other external forces act
