You are driving a 2500.0-kg car at a constant speed of 14.0 m/s along an icy, but straight and level road. While approaching a traffic light, it turns red. You slam on the brakes. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 25.0 m. What is the coefficient of sliding fric- tion (µ) between your tires and the icy roadbed?

You are driving a 2500.0-kg car at a constant speed of 14.0 m/s along an icy, but straight and level road. While approaching a traffic light, it turns red. You slam on the brakes. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 25.0 m. What is the coefficient of sliding fric- tion (µ) between your tires and the icy roadbed?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 63PQ: A 75.0-g arrow, fired at a speed of 110 m/s to the left, impacts a tree, which it penetrates to a...

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You are driving a car at a constant speed of 14.0 m/s along a straight level road. As you approach anintersection, the stoplight turns red and you slam on breaks and the wheels lock and you skid to a stop in25.0 m. What is the coefficient of kinetic friction between your tires and the road?
A really old 1500kg car without ABS brakes is traveling on a flat, horizontal road ay 75mph when the rivers suddenly slams on the brakes. The coefficient of sliding friction between the car tires and the road is 0.35. What distance does the car travel before coming to a complete stop!
A block of mass 0.500 kg slides on a flat smooth surface with a speed of 2.80 m/s . It then slides over a rough surface with uk and slows to a halt. While the block is slowing, (a) what is the frictional force on the block? (b) What is the magnitude of the block's acceleration? (c) How far does the block slide on the rough part before it comes to a halt?
A 91 kg janitor wearing running shoes is running across an ice rink at a speed of 3.2 m/s. They try to stop abruptly, but keep sliding across the surface of the ice. The ice exerts a frictional force of 13.4 N to slow them down. How far do they travel before halting to a stop?
At Ted's request, Bill pushes the pizza box across the granite countertop towards Ted. When the box leaves Bill's hand it is sliding at 2.60 m/s. The box comes to rest over a distance of 110 cm. What is the coefficient of kinetic friction, uk, between the pizza box and the countertop? (Ignore air drag.)
A 26g-bullet is traveling to the + x direction penetrated a mud hill. The stopping displacement is 7.5 cm. If the initial v when it entered the mud hill is 88.5 meter/second. Solve for the Force which stopped the object.
You are driving through the Ouachita Mountains at 12m/s. You see a maple-leaf oak (Quercus acerifolia) crossing the road and hit the brakes, 20m away. The coefficient of kinetic friction between your tires and the road is μ_k = 0.7. Will you strike this endangered broadleaf? Justify your answer with a calculation.Your final answer should be the distance you will travel before coming to a stop.
A parachutist (mass, m = 85 kg including parachute) has an initial velocity, v0 = 52.8 ms-1, immediately after the parachute opens. The drag force provided the parachute varies as a function of velocity, such that Fd = kv2 where k = 13.7 kg/m. Calculate the time it takes in seconds for the velocity to reach half the initial velocity. What is the maximum speed (terminal velocity) in km/h of the parachutist when the parachute is open?
You and your friend Peter are putting new shingles on a roof pitched at 23 ∘ . You're sitting on the very top of the roof when Peter, who is on the edge of the roof, 5.2 m away, asks you for the box of nails. Rather than carry the 2.3 kg box of nails down to Peter, you decide to give the box a push and have it slide down to him. If the coefficient of kinetic friction between the box and the roof is 0.52, with what speed should you push the box to have it gently come to rest right at the edge of the roof?
A 0.30 kg puck is being pushed across a table with a horizontal force of 2.0 N. It starts from rest and is pushed for 13 seconds, ending with a speed of 1 m/s. Calculate the coefficient of friction μk between the puck and the table.
The coefficient of friction between the tires of Shirley's 1985 Ford Coupe and the dry pavement is 0.74. She doesn't drive the car often because it's becoming an antique, but she took it out for a gentle drive yesterday. While driving, she has to suddenly and forcefully brake when the light turned red. She probably shouldn't have been texting and driving! Her car (mass = 1.22x10° kg) skids to %3D a stop with an acceleration of m/s2. Use the approximation g = 10 m/s2.
A skier weighing 90 kg starts from rest down a hill inclined at 17. He skis 100 m down the hill and then coasts for 70 m along level snow until he stops. Find the coef ficient of kinetic friction between the skis and the snow. What velocity does the skien have at the bottom of the hill?