Level 3 mechanics Flashcards
1
Q
If no external forces are applied, what is conserved?
A
Momentum
2
Q
Is momentum conserved in an inelastic collision?
A
Yes
3
Q
On a force-time graph, what is the area enclosed equal to?
A
Impulse
4
Q
What is the velocity of the centre of mass equal to?
A
Total momentum / total mass
5
Q
What is the equation for distance of the centre of mass from an arbitrary point?
A
X com = (m1X2 + m2X2 …) / (m1 + m2 …)
6
Q
If vectors arrange in a closed loop, what does this mean.
A
They all cancel.
7
Q
What is the equation for centripetal force?
A
F = (mv^2) / r
8
Q
A
