Motion, Forces And Conservation Of Energy Flashcards
(37 cards)
What is a vector?
Give examples (6)
They have a size and a direction
Force, velocity, displacement, weight, acceleration, momentum
What is a scalar?
Give examples (6)
They only have a size
Speed, distance, mass, energy, temperature, time
What is the equation for distance?
Distance = speed x time
What is acceleration?
The change in velocity in a certain amount of time
What is the acceleration equation?
Acceleration= change in velocity/time
On a distance time graph, what does a straight diagonal line mean?
Steady speed
On a distance time graph, what does a flat line mean?
Stopped
On a distance time graph, what does an upwards curved line mean?
Accelerating
On a distance time graph, what does a downward curve mean?
Decelerating
On a distance time graph, what does the gradient give?
The speed
What is Newton’s first law?
When there is no resultant force, an object remains moving at a constant velocity
What is Newton’s second law?
If there is no resultant force it’s accelerating
F=ma
What is Newton’s third law?
Every action force has an equal and opposite reaction force
What is the equation for weight?
Weight = mass x gravitational field strength
What is a centripetal force?
The force that keeps something moving in a circle
How do you investigate motion?
Trolley on a ramp experiment
What is inertia?
The tendency for motion to remain unchanged
What does an objects inertial mass measure?
How difficult it is to change the velocity of an object
On a velocity time graph, what does a straight diagonal line mean?
Constant acceleration
On a velocity time graph, what does a flat line mean?
Steady speed
On a velocity time graph, what does a curved upwards line mean?
Increasing acceleration
On a velocity time graph, what does a downwards diagonal line mean?
Constant deceleration
How do you work out the distance travelled on a velocity time graph?
The area under the graph
What is the momentum equation?
Momentum (kg m/s) = mass (kg) x velocity (m/s)
