A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 32 ∘ angle. The block's initial speed is 15 m/s . The coefficient of kinetic friction of wood on wood is μk=0.200.   What vertical height does the block reach above its starting point?   What speed does it have when it slides back down to its starting point?

A 19.0 kg box is placed at the top of an inclined plane and released to either move freely or sit at rest. The plane is at an angle of 30° above the ground and has a total length of d = 2.80 m along the incline. The coefficient of static friction between the box and the plane is us = 0.40 and the coefficient of kinetic friction is pk = 0.30. What kind of friction does the box experience once it is released, and what is its magnitude? m d Kinetic, Fkf - 55.9 N Static, Fsf = 74.5 N Static, Fsf = 64.5 N Kinetic, Fkf = 48.4 N

A driver in a 1000.0kg car traveling at 28 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the road is 0.80, how long will the skid marks be? O 50 m 63 m 40 m O 47 m

A truck is traveling at 14.7 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 19 ° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.789. How far, in meters, does the truck skid before coming to a stop?

A truck is traveling at 10.0 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 11 ° with respect to the horizontal. The coefficient of kinetic friction between the tires and the road is 0.933. How far, in meters,  does the truck skid before coming to a stop?

A crate with mass m = 20 kg is being pushed to the right by a force of magnitude F = 80 N The crate is placed on a rough horizontal coefficient of kinetic friction surface with a HK= 0.2 Take g = 10 m/s² The acceleration of the crate is: 3.8 m/s^2 O 2 m/s^2 O 6 m/s^2 4 m/s^2

An object with mass m = 34 kg is pushed with 452 N of force to be moved across a distance of 4.6 m on a surface with friction. Initially the object is moving at vi = 0.82 m/s and after being moved across 4.6 m, the final speed is 2.5 m/s. What is the magnitude of the frictional force acting on the object in the unit of N?

Wnet = m(v₁)² = m(v₁)², Wnet = Σ₁ W₁, W = Fd cos 0 Problem 1: A 2.0 kg box slides on a floor. A friction force of 5.0 N opposes the motion. If the box starts with a speed of 5.5 m/sec, how far does is slide before coming to rest? Answer: d = 6.1 m Problem 2: What is the force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00 m/sec to 8.00 m/sec in a distance of 25.0 m, if they encounter a wind that exerts an average force of 30.0 N against them? Hint: Wnet = Wrunner - Wwind. Answer: Frunner: = 102.0 N Problem 3: A 500-kg dragster accelerates from rest to a final speed of 110 m/sec in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is the work done by the dragster? Hint: Wnet = Wdragster - Wfriction. Answer: Wdragster = 3.5 × 106 J

At Ted's request, Bill pushes the pizza box across the granite countertop towards Ted. When the box leaves Bill's hand it is sliding at 2.60 m/s. The box comes to rest over a distance of 110 cm. What is the coefficient of kinetic friction, uk, between the pizza box and the countertop? (Ignore air drag.)

Christian is making a Tyrolean traverse as shown in the figure. That is, he traverses a chasm by stringing a rope between a tree on one side of the chasm and a tree on the opposite side, 25 m away. The rope must sag sufficiently so it won't break. Assume the rope can provide a tension force of up to 26 kN before breaking, and use a "safety factor" of 10 (that is, the rope should only be required to undergo a tension force of 2.6 kN) at the center of the Tyrolean traverse. Figure 1 of 1 > Part A Determine the distance that the rope must sag if it is to be within its recommended safety range and Christian's mass is 72.0 kg Express your answer using two significant figures. x= Submit Part B T= VG| ΑΣΦ Submit Request Answer If the Tyrolean traverse is incorrectly set up so that the rope sags by only one-fourth the distance found in part A, determine the tension force in the rope. (Figure 1) Express your answer using two significant figures. —| ΑΣΦ ? Request Answer m ? N