Question

A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m/s for 8.0 seconds. How far does the boat travel during this time?

Answer 1

Answer:

equation of kinematics: motion :

        s = u t + 1/2 a t²

  here u = 0 m/sec  a = 3.0 m/sec/sec    t = 8.0 sec

          s  = 0 * 8.0 + 1/2 * 3 m/sec² * (8.0 sec)²

     distance travelled in 8 sec = 96 meters

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Answer 2

Answer:

➧ u ➾ 0 m/s

➧ a ➾ 30 m/s²

➧ t ➾ 8 sec

❱S ➾ ut + ½ at²

S ➾ 0 × 8 + ½ × 3 × (8)²

S ➾ ½ × 3 × 64 

  ➾ 96 m ...✔

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