A block of mass 6.80 oh is sliding along a frictionless surface with a speed of 8.20 m/s when it comes to a frictionless ramp raised to an incline of 25.0. 

1. what is the max length of the ramp that the block will be able to travel? 

2. consider the block traveling from the bottom to the top of the ramp. identify the forces acting on the block during this time and find the work done by each. 

3. what is the momentum of the block when it is halfway up the ramp?