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A particle's trajectory is described by x =(12t3−2t2)m and y =(12t2−2t)m, where t is in s.

What is the particle's speed at t=0s ? What is the particle's speed at t=5.0s ?  What is the particle's direction of motion, measured as an angle from the x-axis, at t=0 s ?
 

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The correct answer for A particle's trajectory is described by x =(12t3−2t2)m and y =(12t2−2t)m, where t is in s.

What is the particle's speed at t=0s ? What is the particle's speed at t=5.0s ?  What is the particle's direction of motion, measured as an angle from the x-axis, at t=0 s ?

 2 m/s

890 m/s

270°

7.6°

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