Wk.5: Lesson 4: Gravity and Friction

The force that two surfaces exert on each other as they rub against each other.

• gravity
• friction
• mass
• weight

The force that pulls objects towards each other.

• gravity
• friction
• mass
• weight

The amount of matter in an object

• gravity
• friction
• mass
• weight

The measure of the force of gravity on an object.

• gravity
• friction
• mass
• weight

Two factors that affect friction

• mass and distance
• types of surfaces and how hard they are pushed together
• force and distance
• mass and direction

Two factors that affect gravity are

• mass and distance

• types of surfaces and how hard they are pushed together

• force and distance

• mass and direction

When two solid surfaces slide over each other.

• sliding friction
• rolling friction
• fluid friction
• static friction

The force that keeps you from moving

• sliding friction
• rolling friction
• fluid friction
• static friction

The force that fluids apply to a solid object

• sliding friction
• rolling friction
• fluid friction
• static friction

Friction of an object rolling across a surface.

• sliding friction
• rolling friction
• fluid friction
• static friction