Contact and Non-contact Forces Assignment Now that you have learned about forces, complete and submit the following assignment.

For the following situations, describe the contact and non-contact forces that are involved.

Situation
Contact Force(s)
Non-Contact Force(s)
A book sitting on a shelf

A soccer player kicking a ball; the ball soaring through the air and landing on the ground

A hiker in the woods reading her compass to determine which direction to go

A child on a sled; first, the child is sitting at the top of the hill, waiting his turn; then, the child pushes off and slides down the hill, eventually coming to a stop.

I didn't know the subject but I researched and understood so...here goes!!

A book resting on a shelf: contact force- reaction force

                                          non contact force: gravitational force

Soccer ball- contact force- air resistance

                   non contact force- gravitational force

Compass- contact force- reaction force

                non contact force- magnetic force

child on sled- contact force- friction

                      non contact force- gravitational force

Explanation:

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s