A car is driving around a bend in the road. The bend follows a circular path with a radius of r and the surface of the road is horizontal. The car is travelling at a steady speed v. If the car travelled any faster, it would skid outwards. Using the information, write an expression for the coefficient of static friction between the car tires and the road. A) Zero rg B) v2 C) Cannot be determined without the mass of the car D) rg rg

A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 600 N. As the elevator later stops, the scale reading is 390 N. Assume the magnitude of the acceleration is the same during starting and stopping. (a) Determine the weight of the person. N (b) Determine the person's mass. kg (c) Determine the magnitude of acceleration of the elevator. m/s²

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7) Hayley Davidson is riding her motorbike south along a flat, horizontal road. The total weight of Havley her hog is 1800 N. The engine exerts a 600 N force forward. The air resistance acting on Hayley and the bike is 200 N. The total friction between the tires and the road is 100 N. a) Draw a FBD diagram for the system that includes Hayley and her motorbike. b) Calculate the net force on the system. (ANS: b) 300 N)

1. A racing bicycle with rider has a combined mass of 85 kg. The racer is on a velodrome (circular racing track) that has banked curves. The surface is banked at an angle of 35° from horizontal. The track has a radius of 60 m. a) Draw a free-body diagram of the racer viewing the racecar from the front (left) and from above (right.) Ignore friction. Indicate the direction of the acceleration of the racer next to your diagram. b) Based on your free-body diagram do you think the car could possibly stay on a circular path (the track) without friction? Explain. c) Which of the forces you drew has a component in the same direction as the acceleration? Explain. d) Write down your force equations and solve for the acceleration of the racer moving at a constant speed around the track with no friction. (Hint: Use the direction of the acceleration as one of your axes. Do not use along-the-incline and perpendicular-to- the-incline as your axes.) e) What speed would the racer have with this…

A 30-kg box is being pushed along a horizontal surface. The coefficient of static friction between the box and the ground is 0.45, and the coefficient of kinetic friction is 0.35. What horizontal force must be exerted on the box for it to accelerate at 1.2 m/s2? A) 140 N        B) 100 N            C) 170N            D) 36N           E) 67N

Multiple part question: A worker in a factory slides a heavy box up a ramp into a truck. The box has a mass of 84 kg, and the ramp is 3 m long and makes an angle of 34° with the horizontal. The coefficient of friction between the box and ramp is 0.6. What is the weight of the box? What is the normal force acting on the box? What is the force of friction acting on the box?   Assuming the worker pushes the box up the ramp with a constant velocity, how much work does the factory worker do on the box in order to get it into the truck?   How much gravitational potential energy does the box have once it reaches the top of the ramp?

Please answer question asap and just send paper solution and find everything that is asked if you give wrong answer i will report it example 2 i just have 10 mins faster please

3. You are pulling two small children on a sleigh over level snow. The sleigh and children have a total mass of 47 kg. The sleigh rope makes an angle of 23⁰ with the horizontal. The coefficient of kinetic friction between the sleigh and the snow is 0.11. Calculate the magnitude of the tension in the rope needed to keep the sleigh moving at a constant velocity. please hand write it clearly

A physics textbook is placed on an inclined slope with an adjustable angle a. The coefficients of friction between the book and the slope are us = 0.5 and uk = 0.35 %3D respectively. 1m a (i) Initially the book is not moving. Copy the diagram and draw all the forces acting on the book. Show mathematical expressions for the size (magnitude) of each force. If we slowly increase the angle a, at what angle does the book start sliding? (ii) Use the Work-Energy theorem to find a formula (expression) for the speed v of the book when it reaches the bottom, in terms of the angle a.