Forces and Fields Topic Quiz

Force is measured in [blank_start]Newtons (N)[blank_end] Mass is measured in [blank_start]Kilograms (Kg)[blank_end] Acceleration is measured in [blank_start]Meters per Second squared (m/s²)[blank_end]

[blank_start]Friction[blank_end] is a force that opposes motion

What is the equation to find force?

A balanced force makes a change in motion (net force)

Tick all correct statements about unbalanced forces:

Two opposite forces are acting on an object, making the object accelerate. This is an example of [blank_start]an unbalanced[blank_end] force.

Two opposite forces are acting on an object, but the object doesn't move. This is an example of [blank_start]a balanced[blank_end] force.

Check all examples of non-contact forces:

Friction can cause:

[blank_start]Iron[blank_end] is strongly magnetic [blank_start]Nickel, chromium and cobalt[blank_end] are weakly magnetic [blank_start]commercial magnets[blank_end] are an alloy of the two.

If a magnet is cut in half, it ill still have a north and south end.

Forces always act in pairs

When falling, (e.g on earth due to gravity) mass does not effect acceleration. (Mass would effect how hard an object hits the ground, however).

You jump out of a stationary helicopter. After 4 seconds, what will your acceleration be? Answer: [blank_start]39.2[blank_end]m/s²

When you step on the scales, your mass is 45kg. What is your weight? Answer: [blank_start]441[blank_end]N