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- A hockey stick pushes a 0.160-kg puck with constant force across the frictionless surface of an ice rink. During this motion, the pucks velocity changes from 4.00 m/s to (6.00 + 12.00) m/s in 4.00 s. a. What are the scalar components of the force acting on the puck? b. What is the magnitude of the force acting on the puck?a) How much force would be required to start a 1.25-kg object sliding along a horizontal surface if the coefficient of kinetic friction is 0.17 and the coefficient of static friction is 0.20? μK=0.17, μS= 0.20 b) If the force that was applied remained the same as in part a), what would be the acceleration of the object after it started to move? PLEASE SHOW ALL STEPSA cord passing over a pulley connects two masses, as shown, where m1 = 4.30 kgand m2 = 8.50 kg.The system accelerates with magnitud of 1.20 m/s2. The coefficient of kinetic friction between the masses and the incline is the same for both masses. Assume the pulley is frictionless, and the cord is massless. (Due to the nature of this problem, do not use rounded intermediate values in your calculations—including answers submitted in WebAssign.) (a)What is the coefficient of kinetic friction? (b)What is the tension (in N) in the cord?
- An object falling under the pull of gravity is acted uponby a frictional force of air resistance. The magnitude of thisforce is approximately proportional to the speed of the object,which can be written as f = bv. Assume b = 15 kg/s and m =50 kg. (a) What is the terminal speed the object reaches whilefalling? (b) Does your answer to part (a) depend on the initialspeed of the object? Explain.A worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 3.50 m/s. The coefficient of kinetic friction between the box and the surface is 0.20. a) What horizontal force must the worker apply to maintain the motion? b) If the force calculated in part (a) is removed, how far does the box slide before coming to rest?A 71.9 Kg mass is placed on an incline plane that is 38 degrees from the horizontal. a) Assuming friction is negligible, what is the acceleration of the mass? b) Assuming friction is present and the coefficient of friction is 0.61, what is the acceleration of the mass? c) If the distance of the incline plane is 4.3 m, how long does it take the mass to reach the bottom of the plane taking friction into account? *note: steps please
- Can cars "stop on a dime"? Part A Calculate the acceleration of a 1600 kgkg car if it can stop from 34 km/hkm/h on a dime (diameter=1.7cm.)(diameter=1.7cm.) Express your answer to two significant figures and include the appropriate units. Part B How many g's is this? Express your answer using two significant figures. Part C What is the force felt by the 68 kg occupant of the car? Express your answer to two significant figures and include the appropriate units.When you try to move furniture around the room, it’s almost always easier the keep the object movingthan it is to get it started moving.a. Which part (starting or continuing) requires a larger magnitude of pushing force?b. Is the maximum static frictional force larger or is the kinetic frictional force larger?c. Your answer to part b is true for almost every combination of surfaces that could slide acrosseach other. Does the magnitude of the normal force change depending on whether the object isstationary or in motion?d. So why is it harder to get a piece of furniture started than it is to keep it moving?A woman exerts a horizontal force of 111 N on a box with a mass of 31.7 kg. HINT (a) If the box doesn't move, what's the magnitude of the static friction force (in N)? 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.)
- I need serious help with the step-by-step process on how to solve this problem: The speed of a bobsled is increasing, because it has an acceleration of 3.42 m/s2. At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 659 N. The mass of the bobsled and its riders is 252 kg. (a) What is the magnitude of the force propelling the bobsled forward? (b) What is the magnitude of the net force that acts on the bobsled?Alejandra is attempting to drag her 35.5-kg Golden Retriever across the wooden floor by applying a horizontal force. What force (in newtons, N) must she apply to move the dog with a constant speed of 0.8 m/s? The coefficient of friction between the dog and the floor is 0.71. (Use the approximation that g ≈ 10 m/s2) Answer: _________ NTwo weights are connected by a massless wire and pulled upward with a constant speed of 1.50 m/s by a vertical pull P. The tension in the wire is T. In the situation above, what is T equal to? Express your answer in N.