Question

A car is traveling at a constant velocity. At t = 1.5 s, the position of the car is at x = -12 m, and at t = 8.4 s, the position of the

car is at x = -35 m.

What is the velocity of the car in m/s? Keep in mind that velocity is a vector quantity. The direction of the velocity should
be indicated by "+" positive or "-" negative sign. km/h, and mph

What is the velocity of the car in km/h? Show your calculation.

What is the velocity of the car in mph (miles per hour)? Show your calculation.

Answer 1

Answer: -3.33 m/s, -12 km/hr, -7.46 mph

Explanation:

m=(x2-x1)/(t2-t1)

m=(-35-(-12))/(8.4-1.5)

m=(-35+12)/6.9

m=-23/6.9

m=(-23/2.3)/(6.9/2.3)

m=-10/3

m=-3.33 m/s ==> Velocity in m/s

m=-10/3 m/s

m=(-10/1000)/3 km/s

m=-0.01/3 km/s

m=-0.01*60/3 km/m

m=-0.6/3 km/m

m=-0.6*60/3 km/h

m=-36/3 km/hr

m=-12 km/hr ==> Velocity in km/hr

m=-12/1.60934 mph

m=-7.458 mph

m=-7.46 mph ==> Velocity in mph