Forces and Motion Flashcards
What is the formula for average speed?
Speed = Distance / Time
What is the formula for acceleration?
Acceleration = Change in Velocity / Time taken
On a distance-time graph, what does the gradient of the slope tell us?
The speed of the object
On a distance-time graph, what does a flat line mean?
The object has stopped
On a distance-time graph, what does a steep line mean?
Object is travelling at constant speed
On a distance-time graph, what does a curve getting steeper mean?
Object is accelerating
On a distance-time graph, what does a curve that’s levelling off mean?
Object is decellerating
On a velocity-time graph, what does the gradient mean?
The acceleration of the object
On a velocity-time graph, what does a steep line mean?
Object is accelerating
On a velocity-time graph, what does a flat line mean?
Object is travelling at a constant speed
On a velocity-time graph, what does the area under the graph mean?
The total distance travelled
What is the difference between weight and mass?
Weight changes depending on the planet that you’re on and is caused by the pull of gravity
Mass is the amount of atoms in an object and is the same anywhere
What is the formula for weight?
Weight (N) = Mass (kg) x GFS (N/kg)
GFS = Gravitaional Field Strength
What is the First Law of Motion?
As long as the forces are all balanced, then it’ll either stay still (if already stationary) or continue moving at the same velocity
What is the Second Law of Motion?
If there is an unbalanced force, the object will accelerate in that direction
