Speed/distance/time pop quiz [USS NT]

What is the formula for speed?

• speed = distance x time

• speed = distance ÷ time

• speed = time ÷ distance

Answer explanation

The correct formula for speed is speed = distance x time, which means speed is calculated by multiplying the distance traveled by the time taken.

average _ _ _ _ _ = total distance ÷ total time

(a)  

Adam runs 50 m in 10 s. What is his average speed?

• 50 ÷ 10 = 5 m / s

• 10 ÷ 50 = 0.2 m / s

• 50 x 10 = 500 m / s

• 50 + 10 = 60 m / s

Answer explanation

To find the average speed, divide the total distance by the total time taken: 50 ÷ 10 = 5 m/s. Therefore, the correct answer is 50 ÷ 10 = 5 m/s.

A bicycle travels 10 m from A to B in 5 s. It stops at B for 10 s. It travels 20 m more to C in 25 s.

What is the total distance travelled by the bicycle?

• 10 m + 20 m = 30 m

• 5 s + 10 s + 25 s = 40 s

• 10 m + 5 s + 10 s + 20 m + 25 s = 70 m / s

Answer explanation

The correct choice is 10 m + 20 m = 30 m, which gives the total distance traveled by the bicycle.

A bicycle travels 10 m from A to B in 5 s. It stops at B for 10 s. It travels 20 m more to C in 25 s.

What is the total time the bicycle was travelling?

• 10 m + 20 m = 30 m

• 5 s + 10 s + 25 s = 40 s

• 10 m + 5 s + 10 s + 20 m + 25 s = 70 m / s

Answer explanation

5 s + 10 s + 25 s = 40 s

A bicycle travels 10 m from A to B in 5 s. It stops at B for 10 s. It travels 20 m more to C in 25 s.

Given that total distance was 30 m, and total time was 40 s, the average speed of the bicycle was (a)   m / s