Vehicle Crash#

Ahmed is following 5.27 $$m$$ behind a van when it suddenly brakes with an acceleration of -10.7 $$m/s^2$$. Both Ahmed’s van and the van in front of Ahmed were initially travelling at 30.4 $$m/s$$. Ahmed begins to brake ( with the same acceleration as the van in front) 0.2 $$s$$ after the van in front of Ahmed. 1.719 $$s$$ after the van in front of Ahmed starts to brake, Ahmed hits their van.

Part 1#

At what speed is Ahmed’s van travelling when Ahmed hit the van in front of them?

• 14.15 $$m/s$$
• 12.01 $$m/s$$
• 28.26 $$m/s$$
• 9.867 $$m/s$$