Topic 2: Mechanics Flashcards
When can you use SUVAT equations?
When an object is moving at uniform acceleration
What is velocity?
Rate of change of displacement
What is acceleration?
Rate of change of velocity
What is uniform acceleration?
Uniform acceleration is when acceleration of an object is constant.
What does acceleration-time graph area show?
Area under shows change in velocity
What does velocity-time graph gradient/area show?
Gradient shows acceleration
Area shows displacement
What does displacement-time graph gradient show?
Gradient shows velocity
What is a scalar/vector quantity?
Scalar quantity only has a magnitude
Vector quantity has a magnitude and direction
How to resolve a vector?
TO resolve vector;
split vector into horizontal/vertical component
How to add vectors?
Position vectors in tip-to-tail
Use trig
How are projectile motion different to usual vectors?
Horizontal/vertical components are separate. Use different
Horizontal acceleration always 0.
What is a free-body force diagram?
Diagram which shows all forces that act on an object
What is newtons 1st law?
Newtons first law states that an object remains stationary or moves at a constant velocity unless a resultant force is experinced
What is Newton’s 2nd law?
Acceleration of an object ∝ resultant force
F = ma
What is terminal velocity?
Terminal velocity is when driving forces and resistive forces are equal. No acceleration; constant velocity
