The car drove along a straight road in the first hour 60 km and in the next two hours 100 km.

The car drove along a straight road in the first hour 60 km and in the next two hours 100 km. Was his movement straight and uniform?

Since with uniform movement the speed of the car should be the same for equal periods of time, we will compare the speed of the car when passing two sections.
Section 1: V1 = S1 / t1, where S1 = 60 km, t1 = 1 h.
V1 = S1 / t1 = 60/1 = 60 km / h.
Section 2: V2 = S2 / t2, where S2 = 100 km, t2 = 2 hours.
V2 = S2 / t2 = 100/2 = 50 km / h.
Since the speed of the car is different in different areas, the movement of the car was uneven.