## 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 2.19

Assume that an intercontinental ballistic missile goes from rest to a suborbital speed of 6.50 km/s in 60.0 s (the actual speed and time are classified). What is its average acceleration in $latex m/s^{2}&s=1&fg=000000$ and in multiples of $latex g\:(9.80\:m/s^{2})&s=1&fg=000000$ ? SOLUTION: The formula for acceleration is  $latex a=\frac{v_f-v_0}{t}&s=1&fg=000000$ Substituting the given values $latex a=\frac{6.5\times 10^3\:m/s-0\:m/s}{60.0\:s}&s=1&fg=000000$ … Continue reading College Physics Problem 2.19

## College Physics Problem 2.18

A commuter backs her car out of her garage with an acceleration of $latex 1.40\:m/s^{2}&s=1&fg=000000$ . (a) How long does it take her to reach a speed of 2.00 m/s? (b) If she then brakes to a stop in 0.800 s, what is her deceleration? SOLUTION: a) The formula for acceleration is  $latex a=\frac{v_f-v_0}{t}&s=1&fg=000000$ If we … Continue reading College Physics Problem 2.18

## College Physics Problem 2.17

Dr. John Paul Stapp was U.S. Air Force officer who studied the effects of extreme deceleration on the human body. On December 10, 1954, Stapp rode a rocket sled, accelerating from rest to a top speed of 282 m/s (1015 km/h) in 5.00 s, and was brought jarringly back to rest in only 1.40 s! … Continue reading College Physics Problem 2.17

## College Physics Problem 2.16

A cheetah can accelerate from rest to a speed of 30.0 m/s in 7.00 s. What is its acceleration? SOLUTION: The formula for acceleration is  $latex a=\frac{change\:in\:velocity}{time}=\frac{\Delta v}{time}=\frac{v_f-v_0}{t}&s=1&fg=000000$ Substituting the given values $latex a=\frac{30.0\:\frac{m}{s}-0}{7.00\:s}&s=1&fg=000000$ $latex a=4.29\:m/s^{2}&s=1&fg=000000$ You can now buy the complete solution manual for College Physics. Just complete the google form below.

## College Physics Problem 2.15

The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model, you can view hydrogen, the simplest atom, as having a single electron in a circular orbit $latex 1.06\times 10^{-10}\:m&s=1&fg=000000$ in diameter. (a) If the average speed of the electron in this orbit is known … Continue reading College Physics Problem 2.15