WeyPhys KS3 Moments

What is the formula to calculate a turning force or moment?

• Moment = Force / distance

• Moment = Force + distance

• Moment = Force x distance

• Moment = distance/ force

What is the unit of moment or turning force

• Newtons per metre (N/m)

• Newtons per metre squared (N/m²⁾

• Newton-metres (Nm)

• Newton-squared per metre (N^2/m)

What are the 3 main features of a lever system?

• Pivot

• Effort force

• Load force

• Rotater

Why does this (class 1) lever make it harder to lift the heavy load?

• The load is closer to the pivot than the load

• The load is further from the pivot than the effort

• The load is greater than the effort

• The system is a force-multiplier

Will this lever balance?

• Yes

• No

How far from the pivot must the man stand for the lever to balance and lift the elephant?

• 6 m

• 60 m

• 600 m

• 6000 m

What must force F be, in order for the lever to balance?

• 5 N

• 10 N

• 2.5 N

• 20 N

What is the turning force here?

• 40 Nm

• 0.04 Nm

• 0.4 Nm

• 4.0 Nm

How can you make it easier to lift a load in a wheelbarrow? Choose 2 options.

• Increase the wheel diameter

• Have longer handles

• Move the load further towards the handles

• Move the load towards the front of the wheelbarrow

What is the size of force F, in order for this lever to balance?

• 5.0 N

• 6.5 N

• 7.5 N

• 8.0 N