Linear motion

define linear motion

movement of a body in a straight or curved line where all parts move the same distance in same direction over same time

how is linear motion produced + 3 examples

direct force being applied to COM

e.g. shotputter puts force into COM of shot as they throw it + it will travel in a curved path when released

e.g. in bobsleight from top-down view force is put through COM + it moves in staright/curved lin

e.g. during 100m torso remains in linear motion

define + give units of measurement for distance

total length of path covered from start to finish

metres

define + give units of measurement for displacement

shortest straight-line route from start to finish

metres

define + give the calculation + units of measure for speed

rate of change in distance

speed (m/s) = distance (m) / time taken (s)

define + give calculation + units of measurement for velocity

rate of change of displacement

velocity (m/s) = displacement (m) / time taken (s)

define + give calculation + units of measurement for acceleration/deceleration

rate of change in velocity

acceleration (m/s/s) = (final velocity (m/s) - initial velocity (m/s) ) / time taken (s)