The acceleration at ® is equal to the slope of the green tangent line at t = 2 s, which is – 20 m/s². Vz (m/s) 40 30 20 10 t (s) -10 - 20 -30 1 2 3 4 Figure 2.9 (Example 2.6) The velocity-time graph for a particle moving along the x axis according to the expression v = 40 – 5t2.

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The velocity of a particle moving along the x axis varies according to the expression νx = 40 - 5t2, where νx is in meters per second and t is in seconds.
(A) Find the average acceleration in the time interval t = 0 to t = 2.0 s.          (B) Determine the acceleration at t = 2.0 s.

The acceleration at ® is equal to
the slope of the green tangent
line at t = 2 s, which is – 20 m/s².
Vz (m/s)
40
30
20
10
t (s)
-10
- 20
-30
1
2
3
4
Figure 2.9 (Example 2.6)
The velocity-time graph for a
particle moving along the x axis
according to the expression
v = 40 – 5t2.
Transcribed Image Text:The acceleration at ® is equal to the slope of the green tangent line at t = 2 s, which is – 20 m/s². Vz (m/s) 40 30 20 10 t (s) -10 - 20 -30 1 2 3 4 Figure 2.9 (Example 2.6) The velocity-time graph for a particle moving along the x axis according to the expression v = 40 – 5t2.
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