Forces, Momentum and Moments Flashcards
1
Q
Momentum formula
A
p (kgms-1) = m(kg) x v(ms-1)
2
Q
Impulse formula
A
= dP
mv - mu
3
Q
Force and Momentum Linkage
A
F = dP/t
4
Q
Conversation of Momentum
A
In a closed system (no external forces acting on objects), the total momentum of a system remains constant
Total initial = Total final
5
Q
Newton’s Third Law
A
Whenever two objects interact, the forces they exert on each other are equal in magnitude and opposite in direction
(Every action has an equal and opposite reaction)
6
Q
How do safety features reduce impact force
A
Increase contact time during collision (F = dP/t, as t increases F decreases)
Absorbs energy from impact
Reduces force and risk of injury
