MPB 8115 Lecture 17: cardiovascular anatomy and function

1. During a Triathalon, an athlete first swims 800m in 14 minutes, then

bicycles 12 km at an average speed of 19 km/hr, andfinally completes a 5

km run in 26 minutes. What is the athlete'sapproximate average speed for

the whole event?

a) 11.3 km/hr

b) 12.6 km/hr

c) 13.7 km/hr

d) 15.2 km/hr

Which has a greater kinetic energy, a car taveling at 30 km/hr or acar half the mass traveling at 60 km/hr?
I was thinking it is the one traveling at 60km/hr???

On a 2 hr trip a driver initial velocity is 50 miles per hr westand his final velocity is 35 mi per hr at 30 degrees south ofwest
Find a change n velocity
And the average acceleration