Grantham PHY220 Week 2 Assignment Problem 8

If a car is traveling at 50 m/s and then stops over 300 meters (while sliding), what is the coefficient of kinetic friction between the tires of the car and the road?

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College Physics Problem 2.28

A powerful motorcycle can accelerate from rest to 26.8 m/s (100 km/h) in only 3.90 s. (a) What is its average acceleration? (b) How far does it travel in that time? SOLUTION: Part (a). The average acceleration of the motorcycle can be solved using the equation $latex \overline{a}=\frac{\Delta v}{\Delta t}&s=0&fg=000000$. Substitute the given into the equation. … Continue reading College Physics Problem 2.28

College Physics Problem 2.27

In a slap shot, a hockey player accelerates the puck from a velocity of 8.00 m/s to 40.0 m/s in the same direction. If this shot takes $latex 3.33\times 10^{-2}\:s&s=1&fg=000000$, calculate the distance over which the puck accelerates. SOLUTION: The best equation that can be used to solve this problem is $latex \Delta{x}=v_{ave}t&s=0&fg=000000$. That is, $latex … Continue reading College Physics Problem 2.27

College Physics Problem 2.26

Blood is accelerated from rest to 30.0 cm/s in a distance of 1.80 cm by the left ventricle of the heart. (a) Make a sketch of the solution. (b) List the knowns in this problem. (c) How long does the acceleration take? To solve this part, first identify the unknown, and then discuss how you chose the … Continue reading College Physics Problem 2.26

College Physics Problem 2.25

At the end of a race, a runner decelerates from a velocity of 9.00 m/s at a rate of $latex 2.00\:m/s^2&s=1&fg=000000$. (a) How far does she travel in the next 5.00 s? (b) What is her final velocity? (c) Evaluate the result. Does it make sense? Solution: Part (a). For this part, we use the … Continue reading College Physics Problem 2.25

College Physics Problem 2.24

While entering a freeway, a car accelerates from rest at a rate of $latex 2.40\:m/s^2&s=1&fg=000000$ for 12.0 s. (a) Draw a sketch of the situation. (b) List the knowns in this problem. (c) How far does the car travel in those 12.0 s? To solve this part, first identify the unknown, and then discuss how … Continue reading College Physics Problem 2.24