Question

The Tesla Roadster electric car is rated at 16.8kW. How much energy does it use during a one hour drive? Answer in MJ

Answer 1

Answer:

$E = 60.5 MJ$

Explanation:

As we know that power is defined as rate of energy

So we will have

$P = \frac{E}{t}$

so we will have

$E = P \times t$

$P = 16.8 kW$

$t = 1 hour$

$t = 3600 s$

now we have

$E = (16.8 \times 10^3)(3600)$

$E = 60.5 MJ$

Answer 2

(16.8 kW) means (16,800 joules/second)

Energy in 1 hour = (1 hour) x (16,800 J/s) x (3,600 s/hour)

Energy = (16,800 x 3,600) J

Energy =  60,480,000 Joules

Energy = 60.48 MJ