Problem 2.36 - Enhanced with Feedback Part A Chameleons catch insects with their

Question

Problem 2.36 - Enhanced with Feedback Part A Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 260 m/s2 for 20 ms, then travels at constant speed for another 30 ms. During this total time of 50 ms, 1/20 of a second, how far does the tongue reach? Express your answer to two significant figures and include the appropriate units ? You may want to review ( pages 46-49) =1 Value |cm Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining Provide Feedback Continue

Explanation / Answer

Here ,

final velocity after acceleration , v = a * t

v = 260 * 20 *10^-3 m/s

v = 5.2 m/s

Now, for the total distance travelled

total distance travelled = 0.50 * a * t1^2 + v * t2

total distance travelled = 0.50 * 260 * (0.020)^2 + 5.2 * 0.030

total distance travelled = 0.208 m

total distance travelled = 20.8 cm

the total distance travelled is 20.8 cm

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