Do you remember class 8 ?

What is the SI unit of length?

• km (Kilometres)

• hm (Hectometres)

• cm (Centimetres)

• m (Metres)

What is the SI unit of mass?

• kg (Kilogram)

• hg (Hectogram)

• g (Gram)

• cg (Centigram)

What is the SI unit of time?

• yr (Year)

• s (Second)

• h (Hour)

• min (Minute)

The diagram shows part of a ruler being used to find the length of a nail. What is the length of the nail?

*Give your answer in SI units.

• 2.7 cm

• 0.027 m

• 3.7 cm

• 0.037 m

What is the correct equation used to calculate the speed of an object?

• v = d / t

• v = d . t

• v = t / d

• v = d / t²

What is the SI unit of speed?

• km / h

• m / s²

• m / s

• km / s

A car travels 100 km. The journey takes two hours. The highest speed of the car is 80 km/h and the lowest speed is 40 km/h.

What is the average speed for the journey?

• 40 km/h

• 50 km/h

• 60 km/h

• 120 km/h

What is the correct equation used to calculate the acceleration of an object?

• a = d / t²

• a = t / (v - u)

• a = (v - u) / t

• a = (v - u) . t

What is the SI unit of acceleration?

• m / s

• m / s²

• m² / s

• km / s²

A car takes 8 s to increase its speed from 10 m/s to 30 m/s.

What is the acceleration?

• 2.5 m/s

• 3.75 m/s²

• 1.25 m/s

• 2.5 m/s²