## Watch and Learn Due before Test!

On a separate piece of paper, Titled: Slip and Slide:

Watch this video, and this video. Given the information in the videos, and assuming Adam has a mass of 90kg, find the coefficient of kinetic friction from the soap.

The big ramp is 165 ft, which is 50.3 m. It is at an angle of 24º

Adam flies 70 ft (21.3m) away from the ramp

Ignore the loss of velocity on the smaller ramp.

Adams velocity was 14.2 m/s (this is his x axis velocity as GPS units can’t track height. So this was his velocity after the ramp)

You must:

Draw a picture of this ramp and his path.

Solve showing all work at each section of the ramp and the jump.

Must be neatly written. If I can't read it, it doesn't count.

TIP: you are basically working the projectile motion problems backwards. Start with your x axis to find the x axis velocity. Find your resultant velocity, which is how fast he was going at the top of the ramp. That initial velocity will be the final velocity of him going up the ramp.

TIP #2: He started at the top from rest, and don't forget to convert your units to meters!

TIP #3: once you find your acceleration use the free-body diagram to figure out the frictional force pushing against him. Then remember we are looking for the coefficient of kinetic friction NOT the frictional force.

Watch this video, and this video. Given the information in the videos, and assuming Adam has a mass of 90kg, find the coefficient of kinetic friction from the soap.

**Notes:**The big ramp is 165 ft, which is 50.3 m. It is at an angle of 24º

Adam flies 70 ft (21.3m) away from the ramp

Ignore the loss of velocity on the smaller ramp.

Adams velocity was 14.2 m/s (this is his x axis velocity as GPS units can’t track height. So this was his velocity after the ramp)

You must:

Draw a picture of this ramp and his path.

Solve showing all work at each section of the ramp and the jump.

Must be neatly written. If I can't read it, it doesn't count.

TIP: you are basically working the projectile motion problems backwards. Start with your x axis to find the x axis velocity. Find your resultant velocity, which is how fast he was going at the top of the ramp. That initial velocity will be the final velocity of him going up the ramp.

TIP #2: He started at the top from rest, and don't forget to convert your units to meters!

TIP #3: once you find your acceleration use the free-body diagram to figure out the frictional force pushing against him. Then remember we are looking for the coefficient of kinetic friction NOT the frictional force.