Force in action

Question 1

what is the equation for work done

Answer 1

work done(J) = force(N) x distance (m)
distance must be in the line of action of the force

Question 2

what is work

Answer 2

the measure of energy transfer

Question 3

what does 1 newton metre =

Answer 3

1 joule

Question 4

what is elastic and inelastic deformation

Answer 4

elastic - when an object returns to its original shape after force is removed
inelastic - when the object doesn’t return to its original shape

Question 5

how do you change an objects force

Answer 5

-apply more than one force
-if one force was applied the forces are not balances and would move not change shape

Question 6

what is the extension directly proportional to

Answer 6

applied force

Question 7

how do u calculate the force needed to stretch an elastic object

Answer 7

force(N)= spring constant (N/m) x extension(m)

Question 8

the work done is equal to what

Answer 8

the elastic potential energy only is the object is inelastic deformed

Question 9

what is a moment

Answer 9

the turning effect is called moment of a force

Question 10

what is the equation for the moment of force?

Answer 10

moment of force(Nm) = force(N) x distance(m)
the distance must be perpendicular from the line of action of the force to the pivot

Question 11

what are levers are gears used for

Answer 11

1. transmit rotational effects of forces
2. magnify size of applied force or distance force moves
   when applied force moved further than the transmitted force -force increases
   when the applied force is bigger than the transmitted force, distance decreases

Question 12

if the objects are balanced, what can be said about the moments acting on the object?

Answer 12

the clockwise moment are equal to the anticlockwise moments about the pivot

Question 13

what are 3 parts that make up a lever system?

Answer 13

1. load
2. effort
   2.pivot