A person pushes a 20 kg crate with a constant force of 600 N at an angle of 20°belowthe horizontal. The crate starts from rest and after 5 s, is traveling at 4 m/s. What is the coefficient of kinetic friction between the crate and the surface? 1.379) Below are three different masses each of which has a coefficient of kinetic friction of 0.15 between the surface and the masses. The masses are connected by ropes. The mass on the right is being pulled with a force of 300 N.a) What is the acceleration of the system? 9.64 m/s2b) What is the net force acting on each mass? 48.2N, 115.68N, 96.4Nc) What is the force of Rope 1 on mass 1? 55.55Nd) What is the force of Rope 1 on mass 2? 55.55Ne) What is the force of Rope 2 on mass 2? 188.87Nf) What is the force of Rope 2 on mass 3? 188.87N10) A car traveling at 25m/s slams on the brakes and skids for 12m on a drive patch of concrete where the coefficient of kinetic friction is 0.8. The road ends and it skids on wet grass until it comes to a stop. The coefficient of kinetic friction between the wet grass and the tires is 0.3. What is the total distance the car skids? 86.29m11) A 5 kg mass is supported by two cables, as seen below. What is the tension in each of the ropes? 23N, 42.98N300 NMass 1Mass 2Mass 35 kg12 kg10 kgRope 1Rope 2Rope 1
This is the end of the preview.
access the rest of the document.