1) A pendulum is configured to have a period of 2 seconds. What is the length of the pendulum? (Use 10 m/s^2 for g)

If you doubled the length of the pendulum, what would its New Period be?

2) In a car collision, a car experiences a force for 1 seconds. The car’s mass is 700 kg and it was moving at 20 m/s before the collision and slowed down to 8 m/s.
What is the force on the car during the collision?

If the collision was with a 650 kg car that was at rest, what was the speed of the 650 kg car after the collision?