# physics

posted by
**Anonymous**
.

How long will it take an 850 kg car with 40 hp (horsepower) to reach the speed of 15 m/2, neglecting friction?

40 hp=29840 watts

I know P=W/t but what is W?

posted by
**Anonymous**
.

How long will it take an 850 kg car with 40 hp (horsepower) to reach the speed of 15 m/2, neglecting friction?

40 hp=29840 watts

I know P=W/t but what is W?