Abicycle with 0.80-m-diameter tires is coasting on a level road at 5.6 m/s . a small blue dot has been painted on the tread of the rear tire. part a what is the angular speed of the tires? express your answer in radians per second. ω ω = 14 rad/s previous answers correct part b what is the speed of the blue dot when it is 0.80 m above the road?

a)

14 rad/s

b)

11.2 m/s

Explanation:

a)

d = diameter of tire = 0.80 m

r = radius of tire = (0.5) d = (0.5) (0.80) = 0.40 m

v = speed of bicycle = 5.6 m/s

w = angular speed of the tire

Speed of cycle is given as

v = r w

5.6 = (0.40) w

w = 14 rad/s

b)

v' = speed of blue dot

Speed blue of dot is given as

v' = v + rw

v' = 5.6 + (0.40) (14)

v' = 11.2 m/s

f=ma newton

f=100x2.5=250n

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.