Seesaw Moments and Forces

In this video, Timothy introduces the concept of turning effects of forces, also known as moment of force or torque. Using a seesaw as an example, he explains how the moment of force is calculated by multiplying the force by the perpendicular distance from the pivot. The video further explores the principle of moments, stating that when a body is in equilibrium, the sum of anticlockwise moments equals the sum of clockwise moments. Timothy demonstrates this principle with a calculation involving two weights on a seesaw, showing how equilibrium is achieved. The video concludes with a call to action to subscribe for more content.

What are the three terms that refer to the same concept discussed in the video?

• Force, energy, power

• Turning effect, moment of force, torque

• Speed, velocity, acceleration

• Mass, weight, gravity

What is the formula for calculating the moment of force?

• Distance divided by force

• Force multiplied by distance

• Force plus distance

• Force divided by distance

In the context of a seesaw, what is the force that causes it to move?

• The length of the seesaw

• The weight of the person on it

• The color of the seesaw

• The material of the seesaw

How is the perpendicular distance measured in the context of the moment of force?

• Perpendicularly from the line of force to the pivot

• Along the length of the seesaw

• Vertically from the pivot

• Horizontally from the pivot

What is another way to describe the perpendicular distance?

• The diagonal distance between the line of force and the pivot

• The longest distance between the line of force and the pivot

• The average distance between the line of force and the pivot

• The shortest distance between the line of force and the pivot

What does the principle of moments state?

• The sum of anticlockwise moments is less than clockwise moments

• The sum of clockwise moments is greater than anticlockwise moments

• The sum of anticlockwise moments equals the sum of clockwise moments

• The sum of all forces is zero

In the seesaw example, what causes the anticlockwise moment?

• The seesaw itself

• The pivot

• Big Jill

• Small Jill

If Big Jill weighs 100 newtons and is 1 meter from the pivot, what is the anticlockwise moment?

• 50 Nm

• 150 Nm

• 100 Nm

• 200 Nm

If Small Jill weighs 50 newtons and is 2 meters from the pivot, what is the clockwise moment?

• 100 Nm

• 50 Nm

• 200 Nm

• 150 Nm

Why is the seesaw in equilibrium in the example given?

• Because the seesaw is perfectly horizontal

• Because the anticlockwise moment equals the clockwise moment

• Because the seesaw is made of a special material

• Because the seesaw is very light