Question

Hello, I have a bit of a problem with these sums. I would be grateful if anyone can explain this to me. I will mark the correct answer as brainliest. Q1. Two cars started off the race with acceleration 3m/s² and 8m/s². Find the time after which the separation between them is 36 km. Q2. A person is moving on a bike along a straight line ab. When he just passes a, he accelerates his bike uniformly at 1m/s² to reach b. He arrives at b at a speed of 108 kmph after 20 seconds. Find the length ab. The correct answer gets 15 points. Legitimate answers only. Fake ones will be reported and banned.

Answer 1

Answer:

Explanation:

           1.

2 minutes

Explanation:

relative acceleration

36000m = 1/2 *(8-3)t²

t²=14400

t=120s

               2