Forces and Motion Demo

• Science
• Secondary Education

What I know?
What question I have?

CONCEPT CHECK

Inertia- Newton's first law of motion states that "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." 

CONCEPT CHECK

CONCEPT CHECK

Acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. 

CONCEPT CHECK

For every action, there is an equal and opposite reaction.

00:18

Write a hypothesis about the experiment. Will the quarters drop when dollar bill is removed?

00:31

What force acted on the dollar bill?

Why did the penny and glass bottle not fall? Relate an idea, theory or law.

Will the outcome of this expriment change if a sandpaper was used. Explain.

Explore how the “Applied'Force” and “Friction Force” arrows change as you apply different

amounts of force.

Force applied	Is Fa larger, smaller or equal to friction?	Forces on the crate are (balanced/unbalanced)	Observation/Evidence
200
-400
600

Explore how the crate changes when you apply more or less force

What can you say about how the amount of force applied affects an object’s acceleration?!

Explore how the “Total Force” arrow depends on how the crate moves?

As object moves, what happens to the net force arrow?

Concept Questions

What can you change in the experiment to decrease the force needed to move the crate?

What happened when we stop applying force to crate?

Something new? Misconceptions?Thoughs and ideas?

When the forces on an object are balanced, what is the total (net) force?

1. 1 Newton to the left
2. Double the value of opposite force
3. 0 Newton
4. Unable to determined

An object experience a force of 10 Newton pushing to the right and 10 Newton pushing to the left. These forces are

1. Balance
2. Unbalance
3. Inverse
4. Proportional

An object is initially at rest on a frictionless surface. We apply a force of 1 Newton to the right.
What happens?

1. Object pushes back with equal force. Object stays motionless
2. Object starts moving to the right and slows down eventually
3. Object starts to acceerate to the right
4. Object starts moving to the right and continue moving with a constant speed