Question

a lorry is travelling at 13.5m/s along a stretch of road​

Answer 1

Answer:

Proved

Step-by-step explanation:

This question is incomplete. The complete details are:

$v = 13.5m/s$ --- speed of the lorry

$v_2 =50km/h$ --- speed limit on the road

Required

Prove that the lorry is within the speed limit

To do this, we simply convert the speed of the lorry to km/h.

So, we have:

$v = 13.5m/s$

$1m = 0.001km$

and

$1s = \frac{1}{3600}h$

So, the expression becomes:

$v = \frac{13.5 * 0.001km}{1/3600h}$

$v = \frac{0.0135km}{1/3600h}$

Rewrite as:

$v = 0.0135km/h * 3600$

$v = 48.6km/h$

48.6km/h is less than 50km/h (the speed limit).

Hence, the lorry is within the speed limit.