Newton
These are often described as push, pull, or twist.
What are forces?
What is an ammeter?
A measure of what distance is travelled per unit of time.
What is speed?
This type of wave oscillates perpendicular to the direction of travel.
What are transverse waves?
When a vehicle brakes, kinetic energy is transformed primarily into this.
What is heat energy?
On Earth, objects usually stop moving due to this, unless energy is expended to keep them moving.
What is friction?
Electrical power can be transmitted at increased efficiency by increasing this.
What is Voltage?
This will show as a straight line on a distance vs time graph.
What is an object travelling at constant speed?
This type of wave oscillates parallel to the direction of travel.
What are longitudinal waves?
A motor transforms electrical energy into rotational kinetic energy with 80% efficiency, this is how much is lost as heat/sound/etc.
What is 20%?
In this, objects would fall at the same speed due to gravity.
What is a vacuum? (or space, or similar)
At a constant Voltage, to increase current, this must be reduced.
What is resistance?
This will show as a straight line on a speed vs time graph.
What is an object under constant acceleration?
The peak to trough height of a transverse wave.
What is amplitude?
An electric heater transforms all of the electrical input into heat energy, this is its efficiency.
What is 100% efficient?
Two billiard balls are pushed, the red one accelerates twice as fast as the blue. The push on the red must be this (relative to that on the blue).
What is twice as hard as that on the blue?
In a circuit with a variable power supply and a single light globe, current can be reduced by reducing this.
What is Voltage?
A car travels at twice the speed of a cyclist. If they travel the same distance, the car will arrive in this amount of time (relative to the cyclist's).
What is half the time?
The number of waves/pulses that pass a point in a given time.
What is frequency?
An 80% efficient electric motor drives a 50% efficient pump, this is the overall efficiency of the system.
What is 40%?
Two unrestrained marble are pushed equally hard, the red one accelerates twice as fast as the blue. The blue one must be this (relative to the red).
What is twice as heavy as the red?
If two light globes are connected in series or parallel, more current flows in the parallel arrangement. If the light globes were replaced with an equivalent resistor, we can say this about relative resistances of the two arrangments.
What is, the equivalent resistance of the series arrangement is higher than for parallel? (or similar)
An object undergoes constant acceleration. This is the shape of the distance vs time graph
What is parabolic?
Even though matter is not transferred as waves move, waves have this property (that might make one think matter is transferred)
What is speed?
An object is raised 10m on a planet to have potential energy of m*g*h. If it is dropped and all this energy is transformed into kinetic energy of 0.5*m*v², the velocity depends on this unknown.
What is g (gravity)?