moments + levers + gears

Question 1

moment

Answer 1

turning effect of a force around a fixed point

Question 2

equilibrium

Answer 2

in linear motion- resultant force must equal 0
circular motion- sum of clockwise moments equal to sum of anticlockwise moments
object is either not rotating or rotating at constant speed

Question 3

circular motion

Answer 3

moving in a circle at a constant speed, object’s velocity is constantly changing

Question 4

levers and gears

Answer 4

lever allows less force to be used to get the same moment
used to transmit rotational effect of a force from one place to another