A driver wants to travel 250km without recharging. The battery in the electric car stores 250MJ.
Calculate the average amount of work per kilometre that the car can do over this journey without recharging.
Answers
Given: A driver wants to travel 250km without recharging. The battery in the electric car stores 250MJ.
To Find: the average amount of work per kilometre that the car can do over this journey without recharging.
Solution:
The battery in the electric car stores 250MJ.
MJ = Mega Joule
travel 250km without recharging
Hence Work done = 250 MJ = 250 x 10⁶ Joule
Work done for 1 km = 250 x 10⁶ /250
=> Work done for 1 km = 10⁶ Joule = 10MJoule
the average amount of work per kilometre that the car can do over this journey without recharging is 10MJoule
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