Resultant Forces

The video tutorial introduces various forces such as normal contact force, tension, friction, and more. It explains vector and scalar quantities, emphasizing that forces are vectors with magnitude and direction. The concept of resultant force is discussed with examples, showing how to calculate it. Balanced forces are illustrated using a parachutist example. The video also covers free body diagrams, explaining how to draw and interpret them. Scale diagrams are introduced as a method to calculate resultant forces using a parallelogram. The tutorial concludes with a call to action for viewer engagement.

Which of the following is NOT a type of force mentioned in the video?

• Normal contact force

• Friction

• Tension

• Nuclear force

What is the resultant force on a car if it experiences a 10 N force backward and a 30 N force forward?

• 20 N forward

• 10 N backward

• 30 N backward

• 40 N forward

In a free body diagram, how is the object represented?

• As a triangle

• As a square

• As a circle

• As a point

What must be true for an airplane traveling at a constant altitude?

• Lift is greater than weight

• Lift equals weight

• Weight is greater than lift

• Thrust equals drag

What is the first step in drawing a scale diagram to find the resultant force?

• Decide on sensible units

• Draw the arrows at the correct angles

• Measure the diagonal of the parallelogram

• Draw lines to make a parallelogram

In the example problem, what is the angle between the runner and the wind?

• 30 degrees

• 60 degrees

• 45 degrees

• 90 degrees

If a runner is pushed by a wind with a force of 8 N, what is the resultant force if she runs with a force of 10 N?

• 18 N in the direction of the wind

• 2 N against the wind

• 10 N against the wind

• 2 N in the direction of the wind