Please help. I have no idea what I’m doing and am so lost. Thank you in advance

Question

Please help. I have no idea what I’m doing and am so lost. Thank you in advance tructure.com/courses/62305/quizzes/60356/take DQuestion 1 1 pts Consider motion in one dimension. (The sign of the vector quantities is their direction indicator.) An object moves in the positive x-direction with speed 3.6 m/s for 2.2 s. It stops for 4.2 s and then accelerates with acceleration-4.5 m/s2 for 2s. What is the average velocity of this object in units of m/s? Enter a number with two digits behind the decimal point. D Question 2 1 pts A stone is thrown directly upward with an initial speed of 5 m/s from a height of 10.8 m. After what time interval (in s) does the stone strike the ground? Use g-9.8 m/s2. Enter a number with 2 digits behind the decimal point.

Explanation / Answer

Displacement travelled in first 2.2 s

D1= 3.6*2.2= 7.92 m

Displacement travelled in next 2 s

D2= 0.5*(-4.5)*4= - 9 m

AVerage velocity = (7.92- 9)/(2+2.2+ 4.2)= -0.1286 m/s

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