A cyclist descends from the top of a 20m long slope with an angle of inclination 
.
How long does it take the rider to get to the foot of the slope if he does not brake and drive while riding (friction and air resistance are ignored)?
What is the speed at which the rider reaches the foot of the slope if he does not brake or drive while riding (friction and air resistance are ignored)?
Use Newton's second law 
and the equations 
when calculating.
