Explanation:
We have equation of motion s = ut + 0.5 at²
Initial velocity, u = ?
Acceleration, a = 0 km/hr²
Time, t = 2 hours
Displacement, s = 20 km
Substituting
s = ut + 0.5 at²
20 = u x 2 + 0.5 x 0 x 2²
2 u = 20
u = 10 km/hr
Speed of car required to travel 20 kilometers in two hours is 10 km/hr.
