A 10% efficient engine accelerates a 1500kg car from rest to 15m/s. How much energy is transferred to the engine by the burning gasoline?

The input energy is 1687.5 kJ.

Explanation:

Given that,

Mass of car = 1500 kg

Speed of car = 15 m/s

Efficiency = 10 %

Now output is equal to work done

We need to calculate the work done

Using work energy theorem.

Work done = change in kinetic energy

Put the value into the formula

Now we know that efficiency is given by

Hence, The input energy is 1687.5 kJ.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2