Kinematics
This is the total distance travelled divided by the total time.
Average Speed
This is Newton’s first law of motion.
Inertia
This is the distance between two successive crests or troughs.
Wavelength
A horizontal line on a distance-time graph indicates this.
Constant speed
This force always acts downward towards the centre of the Earth.
Weight
The area under a velocity-time graph represents this quantity
Displacement
The net force on an object is equal to mass times acceleration.
Newton's Second law
This type of wave requires a medium to travel.
Mechanical Wave
A curve on a velocity-time graph represents this.
The formula for weight is this.
W = mg
An object falls freely under gravity. Ignoring air resistance, its acceleration is approximately this value.
9.8 ms-2
A 5 kg object accelerates at 3 m/s². The net force is this.
15 N
The speed of a wave is calculated using this formula.
v=fλ
The slope of a displacement-time graph gives this.
Velocity
What is the net force acting on an object travelling at constant speed 5 m/s to the left?
Zero
A car accelerates uniformly from 10 m/s to 30 m/s in 4 seconds. This is its acceleration.
5 ms-2
This type of friction acts when an object is moving.
Kinetic friction
In a transverse wave, particles move in this direction relative to the wave's motion.
What is perpendicular
On a velocity-time graph, this indicates a change in direction.
Crossing the time axis
This is the name for the force that acts perpendicular to a surface.
Normal
This kinematic equation relates final velocity, initial velocity, acceleration, and displacement.
v2=u2+2as
When two objects interact, the forces they exert on each other are equal and opposite.
Newton's Third Law
This phenomenon causes a change in frequency due to the motion of the source or observer.
Doppler Effect
An object slows down if velocity and acceleration have this relationship.
Opposite signs
Another name for change in momentum
Impulse