What is the impact speed when a car moving at 100 km/h bumps into the rear of another car traveling in the same direction at 98 km/h?

Solution 1E Step 1 : We have two cars moving , and one of car dumps into the rear end of another car, we need to calculate the impact speed Considering the data given Speed of car A is s 1 100 km /hr Speed of car B is s 2 98 km/hr Step 2 : Car A and Car B are travelling along same direction , hence the impact speed is given by the difference in their speeds Let impact speed be denoted by s imp Hence we get s = s s imp 1 2 Substituting we get simp = 100 km/hr 98 km/hr simp= 2 km/hr