Chris runs around a circular track with a radius of 39 meters. he makes five trips around the track in 220 seconds. a. what is the circumference of the track? b. how many meters does he run? c. what is his angular speed? d. what is his linear speed?

Circumference is 2*pi*r = 2*3.14*39 = 244.92 m. 5 trips means 5*244.92 = 1,244.6 m. A radian is 2*pi, therefore, he makes 10pi radians in 220 seconds. Or pi/22 radians/sec is his angular speed. His linear speed is the distance he travelled (1,244.6 m) divided by 220 seconds, which is approximately 5.657 meters per second.

Ithink they do have the same properties just in less quantities i think

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.