Focus on forces Topic test

What is a force?

• Push

• Pull

• Shove

• Both a push and a pull

Force is what causes things to start ​ (a)   , or ​ (b)   ​ and ​ ​ (c)  

• moving
• slow down
• stop
• dancing
• singing
• laughing
• do a flip
• do a handstand

When a golf club strikes a ball, a force ​ (a)   to make the ball move

• pushes
• twists
• pulls

Force is measured in units called ______ and is abbreviated as ______

• Newtons, N

• Newtons, m

• Joules, K

• Calories, K

Classifiy the following forces into contact and non-contact forces.

Groups:

(a) Contact forces

,

(b) Non-contact forces

• Applied
• Normal
• Tension
• Magnetic

• Elastic
• Air resistance
• Electrostatic

• Buoyancy

• Gravity

Who is the unit of force named after?

• Isaac Newton

• Albert Eistein

• Michael Faraday

• Richard Newton

What device do we use in the lab to measure force?

• Spring balance

• Electronic balance

• Ruler

• Tape measure

When constructing a free body diagram to represent a force, what do the arrows represent?

• The direction of the arrow is the direction the follow is being applied, and the length of the arrow represents the strength of the force.

• The length of the arrow is the direction of the force and the direction helps show the size of the force

• The arrows direction doesn't matter, as long as the length shows how big the force is

• The arrows can be any length, but the direction shows the direction of the force pointing toward the object.

Forces can add together or subtract from one another. If two forces are acting in opposite directions you should...

• add the forces together

• subtract the forces from each other

• cancel each other out, so there is no net force

• the cars would crash resulting in a huge force gain

What is the net force acting on this object?

• 20 N to the right

• 20 N

• 50 N downwards

• 70 N total

• 20 N to the left