What was the minimum speed of the car when the brakes locked

Reference no: EM13538790

The driver of a 1.13 103 kg car traveling on the interstate at 35.0 m/s (nearly 80.0 mph) slams on his brakes to avoid hitting a second vehicle in front of him, which had come to rest because of congestion ahead. After the brakes are applied, a constant kinetic friction force of magnitude 8.12 103 N acts on the car. Ignore air resistance.

(a) At what minimum distance should the brakes be applied to avoid a collision with the other vehicle? Correct: Your answer is correct. 85.24 m

(b) If the distance between the vehicles is initially only 30.0 m, at what speed would the collision occur? Correct: Your answer is correct. 28.17 m/s Use the values from ABOVE to help you work this exercise. A police investigator measures straight skid marks 29.0 m long in an accident investigation. Assuming a friction force and car mass the same as in the problem above, what was the minimum speed of the car when the brakes locked?

_________m/s

Reference no: EM13538790

Questions Cloud

Find the work done on the woman by friction : Waterslides are nearly frictionless, hence can provide bored students with high-speed thrills, find the work done on the woman by friction

What is the voltage supplied to the recharger : A transformer with a turns ratio (secondary/primary) of 1:14 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit.What is the voltage supplied to the recharger?

Find the maximum height attained by rock : A catapult launches a rock at a 50° angle with respect to the horizontal. Find the maximum height attained if the speed of the rock at its highest point is 30.3 m/s

What is her present equity investment : The market value of her property is estimated to be $950,000 and what is her present equity investment?

What was the minimum speed of the car when the brakes locked : A police investigator measures straight skid marks 29.0 m long in an accident investigation. Assuming a friction force and car mass the same as in the problem above, what was the minimum speed of the car when the brakes locked

Define the water crystallization and formula for the hydrate : If the anhydrous compound (AC) in the preceeding problem has a molar mass of 160g/mol, what are the water crystallization (X) and formula for the hydrate

Calculate the total distance the bird travels : Two trains, each having a speed of 27 km/h, are headed at each other on the same straight track. What is the total distance (in km) the bird travels

Compute the taxable income from operations : The effective gross income (EGI) was $52,000; operating expenses were $19,000; $2,000 was put into a fund for future replacement of stoves and refrigerators

Find the frequency at which the current is one-half : A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 14 ? and L = 3.6 mH, find the frequency at which the current is one-half

User Account

All Pages