Available practice: 75 of 80 marks. Parts 8(b), 10(d) await marking support. Scores cover available parts only.
A man uses a metal bar to remove an iron nail from a piece of wood.
The man applies a force of 150 N perpendicular to the bar and at a distance of 0.50 m from the pivot.
(a)(i)Calculate the moment of this force about the pivot. Give the unit.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[4 marks]
A man uses a metal bar to remove an iron nail from a piece of wood. The force applied by the man produces a turning effect (moment) about the pivot.
(a)(ii)Describe another example of using the turning effect of a force.
Answer guidance
Describe Say what happens, in order. Reasons are not required unless the question also asks why.
[1 mark]
A man uses a metal bar to remove nails from a piece of wood, applying a force perpendicular to the bar at a distance from the pivot. He tries to use the metal bar to remove another nail from the piece of wood. He applies the same force of 150 N at a distance of 0.50 m from the pivot. The turning effect produced is not enough to remove this nail from the piece of wood.
(b)Describe how the man can increase the turning effect without increasing the force.
Answer guidance
Describe Say what happens, in order. Reasons are not required unless the question also asks why.
