At an accident scene on a level road, investigators measure a car's skid mark to be 93 m m long. It was a rainy day and the coefficient of friction was estimated to be 0.31. Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes.

Q: A car drives onto a section of the road which is covered in ice. The driver attempts to stop by…

A: stopping distance(s)=60m initial speed(u)=40 km/h=40×1000 m3600 sec=11.1111 m/sec final speed(v)=0…

Q: A 11 N horizontal force pushes a block weighing 5.4 N against a vertical wall (see the figure). The…

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Q: A student uses a force P of magnitude 55 N and angle 0 = 75° to push a 4.0 kg block across the…

A: Given: The mass of the block is m=4 kg. The magnitude of the force is P= 55 N. The angle with the…

Q: A box with a mass of 8.80 kg slides up a ramp inclined at an angle of 28.3° with the horizontal. The…

A: The free body diagram is shown below: According to the work-energy theorem, the equation can be…

Q: Karev is lowering two boxes, one on top of the other, down the ramp, as shown in the figure, by…

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Q: Traveling at a speed of 14.2 m/s, the driver of an automobile suddenly locks the wheels by slamming…

A: Given that: u=14.2 m/sv=?μ=0.59t=1.14 secg=9.8 m/s2

Q: (c) For the work done by the force on the crate, we have WF=F. Ar = 111 N ( (m) о m cos = J.

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Q: The coefficient of static friction between a toboggan and dry snow is 0.50. If the toboggan’s mass…

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Q: A 12 N horizontal force pushes a block weighing 5.0 N against a vertical wall . The coefficient of…

A: a) The normal force on the block will have magnitude 12N. The force of static friction is given by,

Q: A book with initial velocity 4.46m/s. if the coefficient of kinetic friction between the book and…

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Q: Question 4. A skateboarder of mass m approaches a ramp with height H and an incline angle of 0. You…

A: (a) Given: The mass of the skateboarder is m. The height of the ramp is H. The incline angle is θ.…

Q: This is a book problem I was given to study but I'm confused on how to approach it: A mass m = 13…

A: given datam = 13 kgd = 8.3 mcoefficient of kinetic friction = 0.37angle = 39 degreesT = 58Nx = 2.6…

Q: As shown in the figure below, a box of mass m = 67.0 kg (initially at rest) is pushed a distance d =…

A: As you have already got the answer to sub-parts (a, b, and c), we will solve the remaining sub-parts…

Q: placed on a ramp. The ramp has an incline of ? = 25.7 degrees from the horizontal. The static…

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Q: An object is given an initial speed of 5 m/s on a horizontal surface.It slides 10 m on 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 man has to push his boat on the shore across the mud to get to the water. The coefficient of…

A: The force of friction is given by  F = μ N where, N is the normal reaction and μ is the coefficient…

Q: As shown in the figure below, a box of mass m = 54.0 kg (initially at rest) is pushed a distance d =…

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Q: A horizontal force of 800 N is needed to overcome the force of static friction between a level floor…

A: The magnitude of horizontal force F=800 N The mass of the crate m=200 kg The acceleration due to…

Q: In the first figure here, a sled is held on an inclined plane by a cord pulling directly up the…

A: In the second figure, the magnitude F required of the cord's force on the sled is plotted versus the…

Q: A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If…

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Q: A car is moving at 90km/h. The driver slams on the brakes and slides to a stop. The road is wet and…

A: Given data:  Initial velocity (u) = 90 km/h Final velocity (v) = 0 Coefficient of kinetic friction…

Q: The coefficient of kinetic friction between a box and the floor is μk = 0.14 and the coefficient of…

A: The static frictional force is given by Fs=μsN=μsmg

Q: Consider the incline shown in the figure with inclination angle θ and height h. The coefficient of…

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Q: A truck with a mass of 750 kg is traveling along a wet road at 30.0 m/s The driver slams on the…

A: mass = 750 kg v = 30 m/s coefficient of kinetic friction = 0.5

Q: You are driving through the Ouachita Mountains at 12m/s. You see a maple-leaf oak (Quercus…

A: Initial velocity (v₀) = 12 m/sDistance to the oak tree (d) = 20 mCoefficient of kinetic friction…

Q: Two crates of fruit  are released from the top of a ramp inclined at 30 degrees from the horizontal…

A: Given data Angle, θ=300 Distance traveled along the incline ,s=4.5 m Mass of the apple crate, ma=20…

Q: A book slides across a level, carpeted floor with an initial speed of 3.85 m/s and comes to rest…

A: The initial speed of the book is 3.85 m/s.The final speed of the book is 0 m/s.The distance traveled…

Q: Traveling at a speed of 15.0 m/s, the driver of an automobile suddenly locks the wheels by slamming…

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Q: A book slides across a level, carpeted floor with an initial speed of 4.25 m/s and comes to rest…

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Q: A skier slides down a hill in a straight line. The hill is 60m high and the coefficient of kinetic…

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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.