Definition
What do you know about moment of a force?
a measure of the tendency of that force to rotate an object about a specific point or axis.
What is the unit of moment of a force?
Nm or Newton-Meter
If a force of 10 N is applied at a distance of 2 meters from the pivot point, what is the moment about that pivot?
M = F x d
= 10 N x 2 m
= 20 Nm
When balancing a ruler on your finger, what should be true about the forces and distances involved?
The moments on either side must be equal.
What do you know about force?
Push or pull or an influence that can cause an object to change its velocity, direction, or shape
What is the unit of force?
Force: Newton (N)
If a moment of 50 Nm is created by a force of 5 N, what is the distance from the pivot?
d = M/F
= 50 Nm/5 N
= 10 m
What effect does increasing the distance from the pivot have on the moment, assuming force remains constant?
The Moment increases
What do you know about balancing moment?
A balancing moment occurs when the total clockwise moments about a pivot point are equal to the total anticlockwise moments.
What is the unit of distance?
meter (m)
A seesaw is balanced when a child weighing 30 kg sits 2 m from the pivot. How far must a 20 kg child sit from the pivot to balance the seesaw?
Clockwise Moment = Anti-clockwise Moment
F1 x d1 = F2 x d2
30 kg x 2 m = 20 kg x d2
d2 = 3 m
A door is easier to open when you push at the edge rather than near the hinges. This is because...........
The distance from the pivot is greater.