These are more physics related, but I'm having a lot of trouble with it and I'm getting kind of desperate right now since there's a lot of assignments like these but I'm not quite sure where to get started with these. I was hoping someone here could help me out with it.
a. A car accelerates from a standstill with a constant acceleration of 1,5 m/s2. Show with a calculation that the speed at 5 seconds is equal to 8,0 m/s.
b. A car drives up at a speed of 20 m/s and brakes. Show that the decelaration of car is equal to 2,0 m/s2 and that the braking distance is 100 meters.
a. vf = vo + at vf = final velocity --given as 8 m/s
vo= velocity original -- given as 0 (starts from standstill)
a = acceleration --- 1.5 m/s2
Plug and chug.......
b. same equation vf = 0 vo= 20 m/s a is NEGATIVE = - 2.0 m/s^2 this will allow you to find 't'
then use xf = xo + vo t + 1/2 a t^2 xo = 0 xf= 100 m Remember 'a' is negative (a DEcceleration)