find velocity, distance, force

Question

1. A 5 kg pendulum is released from a height of 10 m higher in elevation than the lowest point of its path. What velocity will the pendulum have as it passes through the bottom of its path?
2. A car accelerates slowly from rest to 25 m/s. It has an acceleration of 3.5 m/s2. This requires 89285J of work.
3. Over what distance does this acceleration take place?

1. How much force is required to perform this acceleration?

Answer 1

For question 1, initially the mass has no velocity but has a certain amount of potential gravitational energy. When it reaches the lowest point of the trajectory, all of that gravitational potential energy has been converted to kinetic energy. I think you should be easily be able to derive the answer from that observation.