The position of a particle that is moving along the x axis is given by x=3 - 6t^

Question

The position of a particle that is moving along the x axis is given by x=3 - 6t^2 + 2t^3 meters and t is in seconds The instantaneous acceleration of this at t = 3s is +96m/s^2 +24m/s^2 +18 m/s^2 +6m/s^2 +3m/s^2 Baseball is batted straight up. At the very top of its trajectory, both the velocity and acceleration are zero, he velocity is zero and the acceleration points downward-e velocity is zero and the acceleration points upward, velocity points upward, hut the acceleration is zero. A text has just been thrown out a window of center. Which of the diagrams below best the individual force(s) acting on the book it is in mid-air ?

Explanation / Answer

a) X component of the force F is Fx= -F sin(25)

b) Mechanical energ is conserved only when non conservative forces do no work

c) Total linear momentum is conserved only when net external force is zero

d) It is always true

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