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Sagot :
The acceleration of the plane : -2 m/s²(negative=deceleration)
Further explanation
Given
vo=245 m/s
vt=230 m/s
t = 7 s
Required
The acceleration
Solution
Motion with constant acceleration
[tex]\tt v_t=v_o+at[/tex]
Input the value
[tex]\tt 230=245+a.7\\\\-15=7a\Rightarrow a=-2.14\approx rounded~-2~m/s^2[/tex]
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