Suppose that a Ferrari and a Porsche begin a race with a moving start, and each moves with constant speed. One lap of the track is 2 km. The Ferrari laps the Porsche after the Porsche has completed 9 laps
If the speed of the Ferrari had been 10 km/h less, the Porsche would have traveled 18 laps before being overtaken. What were the speeds of the two cars?
Porsche speed = 180 km/h; Ferrari speed = 200 km/h
You might also like to view...
The figure shows a color image of Betelgeuse, a red giant star. Which of the surface temperatures below best matches Betelgeuse's surface temperature? Hint: Our Sun at 6000 K is yellow
The order of evolutionary stages of a star like the Sun would be Main Sequence, giant, planetary nebula, and finally
A) hypernova. B) neutron star. C) white dwarf. D) nova. E) black hole.
On the moon, an object dropped from rest falls a distance of 1 m in 1 second. How far will it have fallen during 3 seconds?
A) 6 m B) 3 m C) 12 m D) 9 m E) 18 m
Which of the following best describes the image from a plane mirror?
a. virtual and magnification equal to one b. real and magnification equal to one c. real and magnification less than one d. virtual and magnification greater than one