Question

a motorboat starting from rest on a lake accelerates in the straight line at the constant rate of 3.0 metre per second square for 8.0 seconds .how far does the boat travel during this time?

please answer fast

Answer 1

Given,
Acceleration(a) = 3 m/s²
Time (t) = 8 seconds
Initial velcoity (u) = 0 m/s
Final velocity (v) = 0 + 3 x 8
                           = 24 m/s
We know,
s = ut + 1/2 at²
s = 0 x 8 + 1/ 2 x 3 x 8 x 8
s = 0 + 32 * 3
s = 96
 
∴ Boat travelled = 96 m

Answer 2

┏─━─━─━─━∞◆∞━─━─━─━─┓ ✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭ ┗─━─━─━─━∞◆∞━─━─━─━─┛

➧ 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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