Q1 • A 25 kg object is on a 45 degree slope. The coefficient of friction is 0.23. • Determine net force • Determine acceleration
Q2 • A 95 kg skier is sliding down a 35° hill at constant velocity. Assume no air resistance • What is net force? • What is force of friction? • What is the coefficient of friction?
Q3 • 1) A 63 kg water skier is pulled up a 14° incline by a rope parallel to the incline with a tension of 512 N. The coefficient of friction of kinetic friction is 0.27. What are the magnitude and direction of the skier’s acceleration?
Question 4 • A 62 kg person on skis is going down a hill sloped at 37°. The coefficient of friction between ski and snow is 0.15. How fast is the skier going 5.0 s after starting from rest ?
Question 5 • Stacie, who has a mass of 45 kg, starts down a slide that is inclined at an angle of 45° with the horizontal. If the coefficient of kinetic friction between Stacie’s pants and the slide is 0.25, what is her acceleration?
Question 6 • Kohana, who has a mass of 50.0 kg, is at the dentist’s office having her teeth cleaned. If the component of her weight perpendicular to the plane of the chair is 449 N, at what angle is the chair tilted?
Question 7 • A crate weighing 562 N is resting on a plane inclined 30.0° above the horizontal. Find the components of the weight forces that are parallel and perpendicular to the plane. IF the surface is smooth and the crate starts from rest, after 4 .00 seconds how fast will the crate be moving?
Q8 1) A weight of 562 N starts from rest and slides down the frictionless incline. As it leaves the 30° incline, its speed is 24m/s. a) What is the acceleration of the mass while on the incline? b) What is the length of incline? c) What is the time it takes to reach the level ground?
Q9 A 45 kg block is sliding down a surface inclined 60º to the horizontal. The coefficient of friction is 0.215. a) Draw a free-body diagram of all forces parallel or perpendicular to the inclined surface. b) Calculate the friction force on object c) Calculate the net force on object d) Calculate the acceleration of object
Q10 • A 60 kg box sits on a rough surface, which is angled 35° from the horizontal. The coefficient of friction between box and surface is 0.23. • Draw a free body diagram of all forces on object • Determine if object accelerates. If there is acceleration, determine the amount