SI Units & Metric System and Speed, Velocity, and Acceleration

What is the SI unit for mass?

• Gram

• Kilogram

• Pound

• Ounce

What is the SI unit for length?

• Meter

• Kilometer

• Centimeter

• Foot

A car’s speedometer reads 100 km/h. Convert this to meters per second (m/s).

• 10 m/s

• 27.8 m/s

• 1000 m/s

• 50 m/s

A scientist measures the mass of a rock as 2.5 kg. Convert this into grams.

• 25 g

• 250 g

• 2500 g

• 25,000 g

A track runner sprints 400 meters. Convert this distance into kilometers.

• 0.04 km

• 0.4 km

• 4 km

• 40 km

What is the formula for speed?

• Speed = Distance × Time

• Speed = Distance ÷ Time

• Speed = Time ÷ Distance

• Speed = Time × Velocity

A car travels 120 km in 2 hours. What is its speed?

• 60 km/h

• 120 km/h

• 40 km/h

• 30 km/h

Velocity differs from speed because it includes:

• Acceleration

• Direction

• Mass

• Time

What is the formula for acceleration?

• a = Δv/Δt

• a = v/t

• a = F/m

• a = m/F

A skateboarder starts at rest and accelerates at 2 m/s² for 4 seconds. What is their final speed?

• 2 m/s

• 4 m/s

• 8 m/s

• 16 m/s