A 54.0-kg ice skater is moving at 3.94 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.900 m around the pole. (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. .931416 Correct: Your answer is correct. kN (b) Compare this force with her weight. Frope W

Explanation:

a ) magnitude of force = centripetal force = m v² / R , m is mass , v is velocity of skater , R is radius of circular path .

= 54 x 3.94² / .9

= 931.41 N

= .93141 kN.

b ) Her weight = mg = 54 x 9.8 = 529.2 N

= .5292 kN .

Ratio = .93141 / .5292 = 1.76

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.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide