Forces; Pressure and Density Questions

If a torch has a mass of 800g and a volume of 500cm3. What is it's density?

• 1.8g/cm2

• 1.5g/cm3

• 1.6g/cm3

• 1.6

If a beach ball (blown up) has a volume of 1000cm3 and a mass of 30g. What is it's density?

• 0.03

• 0.03g/cm3

• 0.04g/cm3

• 0.05g/cm3

If a man's feet have an area of 400cm2 and he has a weight of 800N. What pressure does he exert on the ground when standing?

• 2

• 4N/cm2

• 3N/cm2

• 2N/cm2

What is the correct equation for calculating the pressure that an object exerts on something?

• pressure = force ÷ area

• pressure = force + area

• pressure = area ÷ force

• pressure = force x area

If a box has a weight of 80N and exerts a pressure of 1.2N/cm2 on a table. What area of the box is in contact with the table?

• 70.2cm2

• 67.2cm2

• 64cm2

• 66.7cm2

A person with a weight of 500N is sitting on a seesaw 2m from the pivot. What is the moment on their side of the seesaw?

• 1000m

• 1000N

• 1000

• 1000Nm

The moment created on a crane is 200,000Nm. The force being lifted is 50,000N. What is the distance between the crane's pivot and the weight being lifted?

• 10m

• 6m

• 4m

• 5m