Forces and Their Effects Revision

Match the following quantity with its unit

• kg m/s

• density

• N

• momentum

• m/s²

• force

• kg/m³ or g/cm³

• mass

• kg or g

• acceleration

Match the following quantities with their definitions.

• mass x velocity

• density

• mass x gravity

• weight

• force x time

• impulse

• mass/volume

• acceleration

• change in velocity / time

• momentum

Match the following measuring tools with their picture

• ruler

• 
• measuring cylinder

• 
• balance

• 
• stopwatch

• 
• force sensor

• 

Which objects are accelerating?

• the moon going around the earth in a circle

• a plane speeding up before takeoff

• a car slowing down at a stoplight

• a cyclist moving at constant speed in a straight line

Which object has the greater acceleration?

• red

• blue

• green

• they all have the same acceleration

Which forces will always be in the opposite direction to the motion?

• push force

• friction

• drag force

• engine force

Which three expressions are Hooke's Law?

What is the spring constant of the spring in N/mm

(hint: use Hooke's law F = kx)

Answer explanation

A wooden post has a volume of 0.025 m³ and a mass of 20 kg. Calculate its density in kg/m³

Answer explanation

800 kg/m³

What is the volume of the stone in mL?

Answer explanation