A person pushes horizontally with a force of 200. N on a 56.0 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.19. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration?

A block is placed on a wooden plank, which is initially horizontal.  One end of the plank is slowly raised to make it more and more inclined, and for a while the block stays in place on the plank and doesn't slide due to static friction.  Finally, when the plank reaches an incline of 56.3oabove horizontal, the block begins to slide.  What is the  coefficient of static friction between the block and the plank?

A girl exerts a horizontal force of 131 N on a box with a mass of 38.7 kg. HINT (a) If the box doesn't move, what's the magnitude of the static friction force (in N)? (b) What is the minimum possible value of the coefficient of static friction between the box and the floor? (Assume the box remains stationary.)

A 10.0 kg object is pushed across a floor with a horizontal force of 70.0 N. If the coefficient of kinetic friction between the object and the floor is 0.100, what is its acceleration?

A crate of mass 33.9 kg rests on a level surface, with a coefficient of kinetic friction 0.142. You push on the crate with an applied force of 378 N. What is the magnitude of the crate s acceleration as it slides?

A 42.0 kg box on a horizontal surface is being pulled by a horizontal force F= 110N. If the acceleration of the box is 1.20 m/s^2, what is the coefficient of kinetic friction between the box and the surface?

A child is pulling a red wagon full of toys (total mass is 8.75 kg). His pull is 36 N in magnitude and at 23 degrees above the horizontal. He pulls his wagon at a constant acceleration (could be positive or negative). The coefficient of friction between the wagon's wheels and the ground is 0.35. What is the wagon's acceleration?

A 620  kg packing crate is being pulled up a 16 degrees-inclined plane by a rope. The rope is parallel to the incline. The coefficient of kinetic friction is 0.3. (a) What is the size of the normal force acting on the crate? N (b) What is the size of the kinetic friction force acting on the crate? N (c) What is the size of the tension force if the crate is moving with constant velocity?

A hunter is pulling his sled 45 kg in mass behind him on snow. He exerts a pull of 170 N in magnitude and at 21 degrees above the horizontal to ensure he could move at a constant acceleration through the snow-covered land. The coefficient of friction between the sled and the snow is 0.43. What is the hunter's acceleration (could be positive or negative)?

A 16 kg block of steel is at rest on a horizontal table. The coefficient of static friction between block and table is 0.54. (a) What is the magnitude of the horizontal force that will put the block on the verge of moving? 84.7 N (b) What is the magnitude of a force acting upward 60° from the horizontal that will put the block on the verge of moving? X N (c) If the force acts down at 60° from the horizontal, how large can its magnitude be without causing the block to move? N