Section 1,2,3 Flashcards
(16 cards)
What is the formula for stopping distance?
Stopping distance = thinking distance + braking distance
What affects thinking distance when braking?
• Speed
• Reaction time
What affects braking distance?
• Speed
• Mass
• How good the brakes are
• How good the grip is
What is Hooke’s Law?
Extension (stretching) is proportional to force up until a limit (elastic limit)
What is the elastic limit?
The point at which the object will be permanently stretched
What are the characteristics of series circuits?
• Current is the same everywhere
• Voltage is shared between components in proportion to their R
• Total resistance is the sum of all resistances
What are the characteristics of parallel circuits?
Current splits at the junction
Voltage is the same across all branches
The total resistance of the circuit is less than the resistance of the smallest resistance
What is voltage?
The amount of energy transferred per unit charge passed
What is the equation for efficiency of energy transfer?
Useful / Total energy x 100
What does electrically transferring energy mean?
A charge moving through a potential difference
What type of wave is a sound wave?
Longitudinal
Define transverse wave.
Vibrations move perpendicular to the direction of the wave
Define longitudinal wave.
Vibrations travel parallel to the direction of the wave
What is a scalar quantity?
A quantity that has magnitude only
Examples of scalar quantities include mass, temperature, and distance.
What is a vector quantity?
A quantity that has both magnitude and direction
Examples of vector quantities include force, velocity, and displacement.
What is the difference between scalar and vector quantities?
- Scalars have magnitude only
- Vectors have magnitude and direction
