# Physics

posted by Elizabeth

A 500 kg car has an engine that uses only 40% of the energy from the gasoline for motion. If there is 15,000J of potential energy stored in the gasoline, how fast an the car go on the gasoline?

I have no idea how to set this up. Any help?!

1. bobpursley

It is a silly problem, I guess it wants you to ignore road friction, change of elevation, and air friction. If we could do that, it would be very inexpensive to drive. One could drive from LAngeles to SanDiego for no cost.

15000*.4= 1/2 mass*velocity^2

solve for veloctiy

## Similar Questions

1. ### Physics

A 500 kg car has an engine that uses only 40% of the energy from the gasoline for motion. If there is 15,000J of potential energy stored in the gasoline, how fast an the car go on the gasoline?
2. ### math

Which car gives the better gasoline mileage in making the same trip: the car that goes 340 miles on 10 gallon of gasoline or the car that goes 500 miles on 15 gallons of gasoline?
3. ### math

Which car gives the better gasoline mileage in making the same trip: the car that goes 340 miles on 10 gallon of gasoline or the car that goes 500 miles on 15 gallons of gasoline?
4. ### physics

A 40%-efficient car engine accelerates the 1300 kg car from rest to 20 m/s How much energy is transferred to the engine by burning gasoline?
5. ### Physics

Imagine that your car is powered by a fusion engine in which the following reaction occurs. 3*deuterium--->helium + hydrogen + neutron The masses are (2.0141 u), (4.0026 u), (1.0078 u) and (1.0087 u). The engine uses 8.1 10-6 kg …
6. ### Science

A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed …
7. ### Science

A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed …
8. ### Chemistry

If the density of gasoline is 0.66 g/ml , how many kilocalories of energy are obtained from 2.7gal of gasoline?
9. ### Physics

A car's engine is only 12% efficient at converting chemical energy in gasoline into mechanical energy. If it takes 1.8 x 104 N of force to keep the car moving at a constant speed of 21 m/s, how much chemical energy would be needed …
10. ### physics

The thermal energy stored in 1 kg of gasoline is about 10,000 kcal (42,000,000 J). A small car needs a forward force of about 500 N to move slowly at a constant speed on a leveled road (no change in ME). How far should the car go if …

More Similar Questions