chapter 10: Forces and Motion Pre-Assessment

Speed

• the distance an object travels per unit of time

• Speed in a given direction

• The rate at which velocity changes

• A push or pull exerted on an object

Velocity

• the distance an object travels per unit of time

• Speed in a given direction

• The rate at which velocity changes

• A push or pull exerted on an object

Acceleration

• the distance an object travels per unit of time

• The rate at which velocity changes

• Speed in a given direction

• A push or pull exerted on an object

Force

• A push or pull exerted on an object

• magnitude of a force is measured in the SI unit

• the distance an object travels per unit of time

• The rate at which velocity changes

newton

• Speed in a given direction

• The rate at which velocity changes

• A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second

• Combination of all the forces on an object

Net Force

• The overall force on an object when all the individual forces acting on it added together

• the distance an object travels per unit of time

• The rate at which velocity changes with time

• A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second

Friction

• The force that two surfaces exert on each other when they rub against each other

• The rate at which velocity changes

• A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second

• The overall force on an object when all the individual forces acting on it added together

Sliding Friction

• Combination of all the forces on an object

• Friction that occurs when one solid surface slides over another

• The force that two surfaces exert on each other when they rub against each other

• Friction that acts between objects that aren't moving

Static Friction

• Friction that acts between objects that aren't moving

• The force that two surfaces exert on each other when they rub against each other

• A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second

• Occurs as an an object moves through a fluid

Fluid Friction

• the resistance encountered by a body moving through a fluid.

• is the same as static friction.

• only occurs in gases, not in liquids.

• Occurs as an an object moves through a fluid