You are driving your car on a straight road with a coefficient of friction between the tires and the road of 0.55. A large piece of debris falls in front of your view and you immediately slam on the brakes, leaving a skid mark of 30.5 m (100-feet) long before coming to a stop. A policeman sees your car stopped on the road looks at the skid mark and gives you a ticket for traveling over the 13.4 m/s (30 mph) speed limit. a) Draw the FBD of the car with complete details. b) Based on the work-energy theorem, you were likely speeding and should not fight this ticket. Prove this.

Q: Two motorcycles are at rest and separated by 7.5 m. They start at the same time in the same…

A: Initial velocity of each motorcycle (u) = 0 msacceleration of the motorcycle at the back (a1) = 1…

Q: In 1992, a 14 kg meteorite struck a car in Peekskill, NY, leaving a 20-cm-deep dent in the trunk.…

A: The specific equation of motion you use depends on the nature of the motion and the forces involved.…

Q: A 50.0 kg man standing on a spring scale takes a descending elevator ride (DOWNWARD). Starting from…

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Q: Determine the stopping distance for a skier moving down a slope with friction with an initial speed…

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Q: Io, a satellite of Jupiter, is the most volcanically active moon or planet in the solar system. It…

A: Acceleration due to gravity on lo (g') = 1.81 ms2Let the mass of fragment = m

Q: The parameters of instantaneous speed, altitude, net engine thrust, and wind speed are given for the…

A: For the load , ux= 200+30=230 m/s. ( Adding the speed                                            of…

Q: You are a good tree climber and were helping your neighbor kid retrieve his pickle ball that was…

A: Given that,  The ball is about 5m above the ground, h = 5 m Downward initial velocity, u = 2 m/s…

Q: A small block is released from rest at the top of a frictionless incline. The distance from the top…

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Q: A person driving on I-82 glanced at his phone to read a very important text message. When he looked…

A: Displacement S = 96.5 mFinal velocity v = 0 m/sDrag sled mass m = 3.9 kgDrag sled Force Fr = 28 N

Q: A biomechanics forensics expert is attempting to determine the events that led to an automobile…

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Q: A frictionless plane is 10.0 m long and Inclined at 28.0°. A sled starts at the bottom with an…

A: The acceleration of the sled is, a=mgsinθm=gsinθ=9.8 m/s2sin28°=4.60 m/s2 (a) The time taken by the…

Q: SCSU physics and astronomy student club has a recently established tradition of pumpkin drop, from…

A: According to the Newton's laws of motion , the final velocity (v) and the displacement () are…

Q: A shell is fired from a fixed artillery gun with an initial speed u such that it hits the target on…

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Q: You are visiting your cousins for Christmas in New Hampshire where it is freezing. They are crazy.…

A: Applying Newton's second law on the sledge, ∑Fx=mgsin20°=ma     [1]∑Fy=N-mgcos20°=0    [2] From…

Q: School bus drivers are extra careful when they cross railroad tracks. They stop before they cross…

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Q: An object of mass 380 kg is sliding on a track. From A to B, the track is frictionless. From B to C…

A: Given, Mass of the object (m) =380 kg. The velocity of the object at point A vA =10m/s. The time…

Q: A block of mass 5 kg starts to slide down a frictionless plane having an inclination of 25.0° from…

A: mass of block = 5 kg Length of incline = 2 m angle of inclined plane = 25oInitial velocity at the…

Q: you go on a trip on Mars. You toss a coin from an initial height of 0.855 m (about waist height)…

A:

Q: stly, physicist like to express friction forces in terms of the efficient of friction µ, so that = µ…

A: The problem can be solved using free body diagram and equation of motion.The solution for the given…

Q: An object of mass 380 kg is sliding on a track. From A to B, the track is frictionless. From B to C…

A:

Q: A small glider is coasting horizontally when suddenly a very heavy piece of cargo falls out of the…

A: The glider, along with the cargo, are both moving initially horizontally. So their initial vertical…

Q: The coefficient of sliding friction between the tires of a car and the road surface is u = 0.5. The…

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Q: A frictionless plane is 10.0 m long and inclined at 32.0°. A sled starts at the bottom with an…

A: Length of the plane, Inclination of the plane, Initial speed of the sled at the bottom,

Q: What is the coefficient of friction between the tires and the surface?

A: Giiven: m= 2500 kg  Initial velocity =vi=14.0 m/s  Final velocity= 0 m/s  accelerartion due to…

Q: A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a…

A:

Q: TEACHER A frictionless plane is 10.0 m long and inclined at 30.0°. A sled starts at the bottom with…

A: Kinematic equations of motion are- 1) v=u+at2) s=ut+12at23) v2=u2+2as where,u is initial velocityv…

Q: A 7-kg toboggan is kicked on a frozen pond, such that it acquires a speed of 2.1 m/s to the right.…

A: Given Mass of the toboggan is m=7 kg Initial speed of the toboggan is v0=2.1 m/s Final speed of the…

Q: car starts from rest and accelerates at a constant rate until it reaches 90 mi/hr in a distance of…

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Q: A ball of mass m is shot straight up into the air with an initial speed Vị.

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Q: A bungee jumper is jumping off a bridge 25 m high that goes over a river. The quadratic equation h =…

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Q: A puck in a shuffleboard game slides a total of 12 m before coming to rest.  It kinetic coefficient…

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Q: A toy car has a friction coefficient of 0.03. On a 30 degree incline starting from rest, how fast…

A: Given data:  Coefficient of friction (μ) = 0.03 Angle of incline (θ) = 30° Initial velocity (u) = 0…

Q: You are working part-time for the GT Sports Media Complex, editing video for the women’s softball…

A: An impulse is a large force acting on an object in a small interval of time. It is given by the…

Q: Part (d) What is the speed, in meters per second, of the block right before it hits the ground?

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Q: with an initial speed of 8.10 m/s stops propelling himself and begins to coast across the ice,…

A:

Q: A frictionless plane is 10.0 m long and inclined at 37.0°. A sled starts at the bottom with an…

A:

Q: A car with a mass of 1.3x103 kg is skidding to a stop along a horizontal surface. The car…

A:

Q: You place a crate of mass 47.7 kg on a frictionless 3.61-meter-long i to slide down, eventually…

A: The angle of incline is 33. 62° The answer is option (4) approximate 33.8°

Q: Legal Physics. In an auto accident, a car hit a pedestrian and the driver then slammed on the brakes…

A: The distance covered by the car before stopping and after hitting the brakes is given as, s = 280 ft…

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.