1 Choose a suitable scale of forces so that the arrows aren’t too long or too short.
2 Draw in the two forces at the correct scale and at the correct angles.
3 Complete the parallelogram with two dotted lines.
4 Draw the resultant as an arrow from the origin to the opposite corner (the diagonal).
5 Measure the length of the arrow. Use the scale of the forces to determine the magnitude of the resultant force.
6 Determine the direction of the resultant by measuring the angle.
Slide 9 - Slide
Checking the homework
Slide 10 - Slide
Practice exercise
On an experimental setup on the moon a weight with a mass of 5 kilogram is hung on a spring with a spring constant of 0,45 N/m. Calculate the extension of this spring.
Lesson duration is: 45 min
