A man is pulling two boxes, one on top of the other, up the ramp shown by pulling on a rope parallel to the surface of the ramp. The coefficient of kinetic friction between the ramp and the lower box is 0.444, and the coefficient of static friction between the two boxes is 0.800. What is the magnitude of the maximum acceleration the man can pull the boxes up the ramp without having the top box slip off the bottom box?

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 box of mass m = 20.0 kg is pulled up a ramp that is inclined at an angle 0 15.0° angle with respect to the horizontal. The coefficient of kinetic friction between the box and the ramp is µk = 0.285, and the rope pulling the box is parallel to the ramp. If the box accelerates up the ramp at a rate of a 2.89 m/s?, calculate the tension Fr in the rope. Use g = 9.81 m/s² for the acceleration due to gravity. FT = 150.95 N

If the coefficient of kinetic friction, lk, between the block and the surface is 0.40 and the magnitude of the frictional force is 80.0 N, what is the weight of the block? 1.6 N 160 N 166 N 200 N 410 N

Santa Claus tries to drag his bag of presents along a horizontal surface by a red rope that is angled at 55 degrees above the horizontal. Santa Claus applies a force due to tension of 4500N along the red rope. This is the minimum force to just start the bag in motion. The coefficient of kinetic friction between the bag and the ground is 0.3 and the coefficient of static friction is 0.5. What is the mass of the bag?

In the back of the truck is a 200kg box that has a coefficient of static friction of 0.8 and a coefficient of kinetic friction of 0.4 between the truck and the box. You are driving on the freeway at 25m/s. There is a car ahead of you that is driving at 30m/s. Your front bumper is 30m behind the back of the first car. You would like to pass the other car and pull back into the same lane when your back bumper is 10m ahead of the front bumper of the first car in 5 seconds. The length of the car ahead of you is 3m and the length of your car is 4m.a) What minimum acceleration do you need to do this?b) What distance does your car travel in that time?c) Does the box in your truck start to slide off the truck?

A book of mass 9 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient of static friction between the book and the plank is 0.48. What is the maximum angle of tilt for which the book will remain stationary and not slide down the plank?

You are at the grocery store pushing on a shopping cart. The mass of the cart including all the delicious food you will buy is 22.0 kg. The coefficient of friction between the floor and the wheels of the shopping cart is 0.22. In order to accelerate the cart to 2.20 m/s from rest in 2.20 m, what force must you apply to the cart?

A box is initially sliding up a 32.5 ̊ incline at a speed of 13.0 m/s. The coefficients of friction between the incline and the box are μk = 0.680 and μs = 0.740. a)What is the acceleration of the box while it is sliding up the incline? b)How far will the box travel up the inline before coming to a stop? c)What would the coefficient of kinetic friction have to be for the box to be able to slide down the ramp at a constant speed?