If tom weighs 70 kg and the raft weighs 130 kg what speed

Question

1. Tom Sawyer runs 10 m/s down the dock and leaps on to his floating raft already moving 1.5 m/s away from shore. If Tom weighs 70 kg and the raft weighs 130 kg, what speed will they both be moving?
2. Maggie applies the brakes of her car, the car slows uniformly from 15.0 m/s to 0 m/s in 2.50 s.  How far will she travel before stopping.

Which of the named kinematic equations best helps solve this problem?

1. A jet lands with a speed of 100m/s and can accelerate uniformly at a rate of -5.0 m/s² as it comes to rest. What is the minimum length runway to land this plane