Physicist: GROUP #Date: Team:

Education is __________________________HW: Friction Day 1

1) A 9.0 kg box is pulled by a string along a horizontal surface with a coefficient of friction of 0.30 at a constant velocity.

1) How do I determine the force of gravity?

2) How do I determine the normal force?

3) How do I determine the frictional force?

2) An 18.0 kg box is pulled by a string along a horizontal surface with a coefficient of friction of 0.6 at a constant velocity.1) How do I determine the force of gravity?

2) How do I determine the normal force?

3) How do I determine the frictional force?

3) A 20.0 kg box is pulled by a string along a horizontal surface with a coefficient of friction of 0.15 at a constant velocity.

1) How do I determine the force of gravity?

2) How do I determine the normal force?

3) How do I determine the frictional force?

If you need more space, please attach separate paper to show your work and transfer answers here.4) An object has an initial forward velocity of 25 m/s and a constant acceleration of 1.5 m/s2. How far does it travel in 5.0 seconds?

5) A ferry has an acceleration of 0.50 m/s2. If the ferry travels 125m in 20 seconds while accelerating, what was its initial velocity?

6) A rider slows a horse from a 9.5 m/s gallop to a 5.5 m/s canter while traveling a distance of 32m. How much time did this take?

1