Force and Pressure

Opening the door is an example of which type of force?

• contact force

• spring force

• non-contact force

• magnetic force

Force acting per unit area is called

• non-contact forces

• contact forces

• force

• pressure

The force exerted by the earth to pull the object towards itself is called

• electrostatic force

• gravitational force

• muscular force

• contact force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Force changes the

• motion of body

• speed of body

• shape of body

• all of these

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Look at the pressure triangle. How do we calculate the force?

• f ÷ a

• f x p

• p x a

• f ÷ p

Pressure is measured in what units

• Newtons

• m/s

• Pascals

• Moles

Pressure can be measured in Pascales (Pa) or Newtons per square metre.
1 Pa = 1N/m2

• True

• False

What does pressure measure?

• Strength

• Force exerted on a given area of surface

A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?

• The person wearing the boots because the boots have a larger surface area in contact with the floor

• The person with the stiletto heels because they have a larger surface area in contact with the floor

• The person wearing the boots because the boots have a smaller surface area in contact with the floor 

• The person with the stiletto heels because they have a smaller surface area in contact with the floor

A pressure of 10kPa acts on an area of 0.3 m². The force acting on the area will be

• 3000 N

• 30 N

• 3 N

• 300 N