An object moves along a straight line with an acceleration of $2 {m/s}^{2}$ . If its initial speed is $10 m/s$ , what will be its speed $4 s$ later?

20 m/s

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12 m/s

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18 m/s

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16 m/s

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Solution

The correct option is C $18 m/s$
The object has initial velocity, say, $v_{i} = 10 m/s$
Let the final speed of the object be $v m/s$
Acceleration of the object is given by
$a = \frac{Δ v}{Δ t}$
$\Rightarrow 2 = \frac{v - 10}{4} \Rightarrow v = 18 m/s$

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An object moves along a straight line with an acceleration of 2 m/s2. If its initial speed is 10 m/s, what will be its speed 4 s later?

The correct option is C 18 m/sThe object has initial velocity, say, vi=10 m/s Let the final speed of the object be v m/s Acceleration of the object is given by a=ΔvΔt ⇒ 2=v−104⇒ v=18 m/s

An object moves along a straight line with an acceleration of $2 {m/s}^{2}$ . If its initial speed is $10 m/s$ , what will be its speed $4 s$ later?

The correct option is C $18 m/s$
The object has initial velocity, say, $v_{i} = 10 m/s$
Let the final speed of the object be $v m/s$
Acceleration of the object is given by
$a = \frac{Δ v}{Δ t}$
$\Rightarrow 2 = \frac{v - 10}{4} \Rightarrow v = 18 m/s$