i. vf^2=vi^2+2ad change velocities to m/s, then solve for a.
ii. vf=vi+at solve for t
iii. Force=a/mass
iv. power=(force*velocity)=(1800*V) where V is in m/s
A racing car of mass 850 kg accelerates from 20 km/h to 160 km/h over a distance of 300 metres. Frictional forces and wind resistance can be assumed to be 800N.
Determine the following:
(i)The average acceleration
(ii)The time taken to accelerate from 20 km/h to 160 km/h
(iii)The tractive force produced by the car to provide this acceleration
(iv)The car finally reaches a speed of 250km/h. Friction and wind resistance are 1800 N at this speed. What power output is required to maintain this speed?
1 answer
1 answer