A person moves a 125 kg object by applying a force F = 450 N at an angle of 30° above the horizontal. The coefficient of kinetic friction between the object and the ground is 0.22. What is the magnitide of acceleration?

A 9 kg fish hangs from a fishing line. The fish is lowered, such that the tension in the line is 60% of what the tension would be at rest. What is the magnitude of the acceleration of the fish? Answer to 3 sig figs.

A toboggan approaches a snowy hill moving at 15.0 m/s. The coefficients of static and kinetic friction between the snow and the toboggan are 0.460 and 0.350, respectively, and the hill slopes upward at 41.0° above the horizontal. Find the acceleration of the toboggan as it is going up hill, and find the acceleration after it has reached the highest point and is sliding down hill.

A block is placed on the midpoint of a ramp that is inclined at an angle of 39.8º from the horizontal, at which point the block immediately starts to slide down the ramp due to the fact that the static friction limit for this particular case is insufficient to hold the block in place. If the coefficient of kinetic friction between the block and the ramp is  0.277 , what is the magnitude of the acceleration of the block as it slides down the ramp.

Suppose a 116 kg crate is pulled by a horizontal force of 675 N along a flat surface.  The coefficient of kinetic friction is 0.35.  Find the acceleration of the crate.

A 105-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.659. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.32 s, what is his initial speed?

(a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.) (b) If the 250-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a). m/s2

Consider a 21.6-kg box on a ramp angled at 45.2 degrees above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.210 and the coefficient of static friction is 0.401. Find the magnitude of the acceleration (in m/s2) of the box down the ramp.