A 6.80 kg block of wood has a static coefficient of 0.340 and a kinetic coefficient of friction of 0.170 between it and a desk.

Calculate the maximum force of static friction.

Calculate the force of kinetic friction (i. e. find Ff).

If the block is at rest, and I exert a force of 27.0 N to make it move, does it slide? Why or why not? Explain your answer with numbers and words.

If the block is at rest, and I exert a force of 20.0 N to make it move, does it slide? Why or why not? Explain your answer with numbers and words.

Any help is appreciated. If the question is solved, could you provide the steps so I can learn please :)

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

What causes the formation of ocean currents?