topic 3: dynamics Flashcards
1
Q
Newton’s first law of motion.
A
An object will remain at rest or in a state of uniform motion unless it is acted on by an external force.
2
Q
law of inertia
A
Reluctance of an object to “accelerate”
3
Q
acceleration 3 meanings
A
Speed up slow down Change direction (centripetal acceleration)
4
Q
newtons second law
A
Force = mass x acceleration
5
Q
define force
A
Rate of change of momentum
6
Q
Force =
A
F= ma F = m(v-u)/t F = mv - mu / t
7
Q
Impulse
A
F = m a F = m(v-u/t) Ft = m(v-u) Ft = mv - mu
8
Q
What is impulse
A
impulse is force x t
Units are Ns (newton seconds)
9
Q
newtons third law
A
When object A exerts a force on object B
then object B exerts an equal and opposite force on object A
