15. A car is traveling at 50 mi/h on a straight horizontal highway. The driver suddenly slamson the brakes to stop the car. a) When the road is dry, the coefficient of friction betweenroad and tires is µ, = 0.6. Calculate the minimum distance (in meters) in which the carcan come to rest. b) On a rainy day, when the road is wet, the coefficient of frictionbetween road and tires is µ, = 0.1. What is the minimum stopping distance (in meters)now?Comment: Modern cars are equipped with anti-lock braking systems (ABS). The ABSprevents the wheels from completely locking up. When the wheels lock up completely,they begin to slide on the road and thus experience kinetic friction. When the wheels donot lock up completely, they experience rolling friction. In this context, rolling frictioncan be approximated as static friction.

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Description: 15. A car is traveling at 50 mi/h on a straight horizontal highway. The driver suddenly slamson the brakes to stop the car. a) When the road is dry, the coefficient of friction betweenroad and tires is µ, = 0.6. Calculate the minimum distance (in me

initial velocity velocity of the car, V1 = 50mi/h =50 * 1 / 2.237 m/s = 22.35 m/s final velocity…

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A car is traveling at 50 mi/h on a straight horizontal highway. TI on the brakes to stop the car. a) When the road is dry, the coeffic road and tires is µ, = 0.6. Calculate the minimum distance (in can come to rest. b) On a rainy day, when the road is wet, th

A car is traveling at 50 mi/h on a straight horizontal highway. TI on the brakes to stop the car. a) When the road is dry, the coeffic road and tires is µ, = 0.6. Calculate the minimum distance (in can come to rest. b) On a rainy day, when the road is wet, th

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 48P: Why is the following situation impossible? A 1.30-kg toaster is not plugged in. The coefficient of...

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A crate of weight Fg is pushed by a force P on a horizontal floor as shown in Figure P4.83. The coefficient of static friction is s, and P is directed at angle below the horizontal. (a) Show that the minimum value of P that will move the crate is given by P=sFgsec1stan (b) Find the condition on in terms of , for which motion of the crate is impossible for any value of P. Figure P4.83
(a) Find the tension in each cable supporting the 6.00 102-N cat burglar in Figure P4.35. (b) Suppose the horizontal cable were reattached higher up on the wall. Would the tension in the other cables increase, decrease, or stay the same? Why? Figure P4.35
(a) What is the minimum force of friction required to hold the system of Figure P4.74 in equilibrium? (b) What coefficient of static friction between the 100.-N block and the table ensures equilibrium? (c) If the coefficient of kinetic friction between the 100.-N block and the table is 0.250, what hanging weight should replace the 50.0-N weight to allow the system to move at a constant speed once it is set in motion? Figure P4.74
A woman pulls a 20 kg suitcase across a rough pavement with the handle making an angle of 29° with the horizontal. The suitcase wheels are broken and it slides for 28 m at a constant speed. Take \mu_kμ k = 0.4. What is the magnitude of the force, F (in N), the woman exerts on the suitcase?
A man is driving his SUV with speed 51.0 mi/h on a horizontal stretch of road. (a) When the road is wet, the coefficient of static friction between the road and the tires is 0.104. Find the minimum stopping distance (in m). m (b) When the road is dry, μs = 0.596. Find the minimum stopping distance (in m). m
an A clarinetist, setting out for a performance, grabs his 3.390 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air. At one moment, the clarinetist is applying an upward force of 41.57N Use g=9.810(m)/(s^(2)) for the acceleration due to gravity. At this moment, find the vertical component of the case's acceleration a_(y) find a_(y)=________(m)/(s^(2))
A car is travelling at 50.0 km/h on a flat highway. (a) If the coefficient of frictin between road and tires on a rainy day is 0.100 , what is the minimum distance in which tha car will stop? (b) What is the stopping distance when the surfaces is dry and the coefficient of friction is 0.600?
3. Four blocks, with masses m1 = 5.20 kg, m2 = 4.20 kg, m3 = 7.80 kg, and m4 = 7.30 kg, are pulled on a horizontal frictionless surface by a 35.0 N force that makes a 39 o angle (θ) with the horizontal (see figure). What is the magnitude of the tension between the m3 and m4 blocks?
43. A snow skier of mass 85.0 kg slides with constant velocity down a slope that makes an angle of 10.0° with the horizontal. (a) What is the coefficient of sliding friction? (b) If the slope increases to 15.0° what will be the skier’s rate of acceleration?
1.) An athlete slides down from rest 40.0 meter along an icy hill which is 35 degrees from the horizontal. He then continues sliding on the level ice. a) If the coefficient of kinetic friction between the athlete and ice is 0.20 (neglect air resistance) find speed (m/s) of athlete at the foot of the plane. b) ) find the distance (m) from the foot of the plane to the point where he has landed to the level ice
Two teams of nine members each engage in a tug of war.Each of the first team’s members has an average mass of 68kg and exerts an average force of 1350 N horizontally. Eachof the second team’s members has an average mass of 73 kgand exerts an average force of 1365 N horizontally. (a) Whatis magnitude of the acceleration of the two teams? (b) What isthe tension in the section of rope between the teams?
Why is the following situation impossible? A 1.30-kg toaster is not plugged in. The coefficient of static friction between the toaster and a horizontal countertop is 0.350. To make the toaster start moving, you carelessly pull on its electric cord. Unfortunately, the cord has become frayed from your previous similar actions and will break if the tension in the cord exceeds4.00 N. By pulling on the cord at a particular angle, you successfully start the toaster moving without breaking the cord.