What unit do we use to measure force?
Newtons
An object can change its motion from rolling friction into....
Sliding friction
...can be any object that is rotating / turning on an axis.
Rolling friction
Resistance of a fluid to change in shape is called...
Viscosity
What is the thing that keeps everything on Earth from flying into the air?
The force of Gravity (not friction!)
Is it easier to stop a bike on a sunny day or a rainy day?
It's easier to brake on a sunny day, ground is slippery on rainy days, so you get less friction = harder to stop.
True or False: Heavier objects require more force to move and stop.
True
True or False: Friction allows us to grip objects and to stand up.
True.
... takes place when an object touches other object.
Friction
Type of friction force that happens when a body moves through water.
Fluid resistance
... is the force of gravity on a person or object at the surface of a planet.
Weight