4. A 100 kg crate sits on the concrete floor of a warehouse. The static coefficient of friction of wood on concrete is .62. Kinetic is 55.

a Calculate the force needed to get the crate moving from rest.

b. Calculate the force needed to keep the crate sliding at a constant velocity

Calculate the force needed to accelerate at 3.2 m/s.

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.