Here are two Physical Science problems. I just need to know how to solve them. I only have $13 credit and I'll pay it for these two problems. Please help me.
1. A man pulls a 14-kg sled 44 meters along an angled hill with a force of 95 N, which elevates the man 30 meters above the bottom of the hill. The man then hops on his sled and slides to the bottom of the hill back along his 44 meter path, during which a 296 N frictional force acts upon his sled. How much work in Joules does the man do against friction in pulling the sled up the hill?
2. A motor spins a disk (Inertia of the disk=25.5 kg*m^2) with a torque of 39 N*m, and a 18 N frictional force acts on the disk at a radius of 1.4 m. Attached to the disk at a radius of 6.6 m is a 13 kg mass. What is the magnitude of the angular acceleration in rad/s^2 of the system?