Recent content by Thietlan

Neither did I and yes while dividing by 3.6 gives one of the responses I don't really get why I would need to divide. If it is in km/h then we should be multiplied by 3.6 and if it were in m/s well,in case there is no need to convert.

Ok I calculate acceleration as the derivative of v which comes out to be ## a=36 \cdot \beta t^3 km/h^2 ## and then simply calculate F= m*a(20) ,still doesn't give the right answer. What else am I missing?

Then how should I go about solving it?

v(20)=288000 m/s=80000km/h a=(80 000-0)/(20 -0)=4000 m*s^(-2) F=m*a=0.0005*80 000 which doesn't fit any answers