Acar travels at a constant velocity of -30 m/s for 160 m. how much time does it take a car to travel the 160 m

We have equation of motion , here S = displacement, u = initial velocity, t is the time taken and a is the acceleration.

In this case displacement = 160 m

Initial velocity = 30 m/s

Acceleration =

Substituting we will get

So car will take 5.33 seconds to travel 160 m.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

k2s for potassium sulphide