Slides in this set
Speed (m/s) Distance (m) Time (s)
Acceleration (m/s)2 change in velocity (m/s)
Curve=change in acceleration
Distance travelled=area between two intervals…read more
FORCES AND MOTION
Balances forces=no change in velocity
Steady speed=zero resultant force
Resultant force = 0? Body remains stationary
Resultant force (N)
Vehicle-steady speed. Frictional forces balance
the driving force
Faster a body moves through fluid- greater
frictional force acts on it
Body falling through fluid- initially acceleration due
to force of gravity. Eventually resultant force =0.
body falls at its terminal velocity…read more
MOMENTUM & COLLISIONS
Greater mass& velocity. More momentum it has.
Momentum (Kg m/s)
When a force acts on a body that is moving, or able to
move, change in momentum occurs.
Momentum before=momentum after when no external
Forces cause a change in momentum:
Larger force=faster change in momentum(greater
Momentum changes very quickly, forces on body large,
likely to cause injury.
Longer for change in momentum=smaller the force.…read more