Sprint 10:54 PM webassign.net The velocity vs. time graph for an object moving a

Question

Sprint 10:54 PM webassign.net The velocity vs. time graph for an object moving along a straight path is shown in the figure below. (m/s (i) Find the average acceleration of this object during the following time intervals (a) 0s to 5.0 s m/s? (b) 5.0s to 15 s (c) 0s to 20 s m/s (ii) Find the instantaneous accelerations at the following times. (a) 2.0s m/s (b) 10s (c) 18 s m/s Need Help?s A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 180 mi/h in 2.60 s (a) Find the average acceleration of the plane. m/s2 (b) Assuming the acceleration is constant, find the distance the plane moves

Explanation / Answer

Here ,

i) for the average acceleration

average acceleration = change in velocity/time taken

average acceleration = (- 8 - (-8))/5

average acceleration = 0 m/s^2

b) average acceleration = (8 - (-8))/(15 - 5)

average acceleration = 1.6 m/s^2

c)

average acceleration = (8 - (-8))/20

average acceleration = 0.8 m/s^2

ii) for the instataneous acceleration

a) at 2 s

as the velocity is not changing

acceleration is zero

b) at 10 s

acceleration = (8 - (-8))/10

acceleration = 1.6 m/s^2

c) at t = 18 s

as the velocity is not changing

acceleration is zero

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