Forces, Moments and Momentum Flashcards
1
Q
p
A
m*v
2
Q
Δp
A
F*Δt
3
Q
How do safety features, such as airbags, crumple zones and seatbelts, work?
A
By increasing the time taken for momentum to go to 0, therefore decreasing the force because F=Δp/Δt
4
Q
p(before collision)
A
p(after)
5
Q
m(1)u(1)+m(2)u(2)
A
m(1)v(1)+m(2)v(2)
6
Q
Δp
A
p(after)-p(before)
7
Q
Δp
A
m(v-u)
8
Q
What does every action have?
A
An equal and opposite reaction
9
Q
Moment
A
Force*Perpendicular distance from pivot
10
Q
Where does the weight of a body act through?
A
Its centre of gravity
11
Q
Principle of moments
A
In equilibrium the sum of the clockwise moments is equal to the sum of the anticlockwise moments
