Resultant force and vectorsIB MYP Physics: Mind map

Exam questions on Resultant force and vectors

1. A delivery cyclist in Nairobi rides 6 km east along a straight road, then turns and rides 8 km north to reach a school. The whole journey takes 40 minutes.
   Explain why the size of the cyclist's displacement is different from the distance she travels.2 marks
2. Two workers in a warehouse in Lagos push a heavy crate along a smooth floor. Friction between the crate and the floor is so small that it can be ignored. One worker pushes to the right with a force of 300 N and the other pushes to the left with a force of 220 N.
   A third worker joins and also pushes to the left, with a force of 80 N. The crate is moving to the right at that moment. Calculate the new resultant force and describe how the crate's motion now changes.2 marks
3. A student in Seoul is finding out how two forces at right angles combine. She fixes a small metal ring to a flat board. Two newton meters pull the ring at right angles to each other, and a third newton meter pulls in the opposite direction to the resultant of the first two so that the ring stays at rest.
   She pulls the ring with forces of 6.0 N and 8.0 N at right angles to each other. Calculate the reading on the third newton meter when the ring is at rest.3 marks