) Questions & Answers {Grade
A} 100% Correct
Distance travelled - correct answer speed x time
Acceleration - correct answer change in velocity ÷ time
Distance time graph - correct answer gradient = speed
Velocity time graph - correct answer gradient = acceleration
Drag increases... - correct answer as speed increases
Friction - correct answer slows things down
Objects falling through fluids (gas or liquid) - correct answer can reach a terminal
velocity
Newtons first law - correct answer objects with balanced forces acting on them will
stay at rest, or in constant motion.
,Newtons second law - correct answer force + mass x acceleration
Inertia - correct answer the tendency for motion to remain unchanged
Newtons third law - correct answer when two objects interact the forces the exert on
each other are equal and opposite
Stopping distance - correct answer thinking distance + braking distance
Thinking distance variants - correct answer speed, reaction times
Reaction time inhibitants - correct answer drowsiness, alcohol/drug influences,
concentration/distraction
Braking distance variants - correct answer speed, weather, tread on wheels, brakes
condition
Braking - correct answer relies on the friction between tires and road
Momentum - correct answer mass x velocity
, Total momentum laws in a closed system - correct answer total momentum before
collision will be the same as the total momentum after collision
Force (momentum) - correct answer change in momentum ÷ change in time
Waves - correct answer transfer energy in the direction they are travelling
Amplitude of a wave - correct answer height between undisturbed position and crest
Wavelength - correct answer distance between crests or troughs
Crests - correct answer top point
Trough - correct answer bottom point
Transverse waves - correct answer have sideways vibration eg electromagnetic
waves
Longitudinal waves - correct answer parallel vibrations eg sound
Wave speed - correct answer frequency x wavelength