Vocab
This is a force that resists sliding when 2 things touch. Example: Book sliding on a table
Friction
Two objects with 20N of force each collide - what is the Net Force?
0N
This non contact force pulls the bridge and its load toward Earth.
Gravity
In on egg test, the largest force is 24N. In another test, the largest force is 20 N. Which is the smallest peak Force?
20N
True or False - A large concrete block just immediately breaks in half when downward Contact Force is applied to it
False
This is a the greatest force reached during a collision
Peak Force
Why is air resistance considered a contact force?
Because air is matter.
This type of force occurs when the weights touch and push on the bridge.
Contact Force
For the egg project, we were trying to increase the amount of ___________.
Air Resistance or Air Friction
What is Force measured in? (What are the units called?)
Newtons
This is the non-contact force that pulls objects toward Earth
Gravity
A sled slides to the right across snow. Friction pushes in this direction.
To the left
Bridge A supports 240 g before breaking. Bridge B supports 360 g. Bridge B supports how much more mass.
120g
For the egg project, we were trying to decrease to total _____ ______.
Peak Force
A box experiences 14 N to the left and 9 N to the right. Its net force is this amount and direction.
5N to the left
This is a force from the air that slows a moving object
Air Resistance
A goalkeeper’s hands push against a soccer ball while catching it. This is the type of force involved.
Contact Force
A bridge stays still because the upward support force equals the downward force. What is it called when 2 forces equal each other?
Balanced Forces
During the egg project, some of the materials were ________ the energy when the egg hit the ground.
Absorbing
A magnet attracts a paper clip without touching it. What type of force is this?
Non-Contact force
This is when a change in an object’s shape, such as bending or squishing happen
Deformation or the object deforms and goes back to normal
A metal can remains dented after the pushing force is removed. This is the type of deformation.
Permanent Deformation
A noodle bridge bends under a load but returns to its original shape when the load is removed. This is the type of deformation.
Temporary Deformation?
Identical egg devices fall from the same height. The blue parachute takes 2 seconds; the green takes 4 seconds. Which parachute gives the lower average falling speed.
The Green Parachute
What is one way to get a closer look at what is happening during a collision?
Slow Motion Video / Slow it down