Types of Forces

What is a force?

• It is something an object has

• A physical object in physics

• A push or pull acting on an object resulting from an interaction between two objects.

What category of forces can result when no contact occurs between objects?

• Contact Forces

• Field Forces (Non-Contact Forces)

Describe a Gravity Force

• Contact Force pulling  downward

• Non-Contact Force  pulling downward

• Contact Force  pushing upward

• Non-Contact Force pushing upward

If you punch the table top, your hands hurts because the table pushed back against your hand.  You know this because your hand did not go through the table.  With what  type of force did the table push?

• Gravitational Force

• Normal Force

• Frictional Force

In which direction does the string interact with the ball through a tension force? 

• downwards

• upwards

• left

• right

If you push a box as pictured, in which direction does friction act on the box?

• upward

• downward

• left

• right

What direction does air resistance push?

• In direction of motion.

• Against the direction of motion.