At takeoff a commercial jet has a 60.0 m/s speed. Its tires have a diameter of 0.850 m.(a) At how many rpm are the tires rotating? rpm(b) What is the centripetal acceleration at the edge of the tire? m/s2(c) With what force must a determined 10-15 kg bacterium cling to the rim? N(d) Take the ratio of this force to the bacterium's weight. (force from part (c) / bacterium's weight)
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
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At takeoff a commercial jet has a 60.0 m/s speed. Its tires have a diameter of 0.850 m.(a) At how many rpm are the tires rotating?
rpm
(b) What is the centripetal acceleration at the edge of the tire?
m/s2
(c) With what force must a determined 10-15 kg bacterium cling to the rim?
N
(d) Take the ratio of this force to the bacterium's weight.
(force from part (c) / bacterium's weight)
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