A body of mass 5 kg accelerates from rest to a velocity of $10 {m s}^{- 1}$ in 5 s. Calculate the net force acting on the body:

25 N

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5 N

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10 N

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250 N

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Solution

The correct option is C 10 N
Given $m = 5$ $k g$ , $u = 0$ , $v = 10$ $m s^{- 1}$ , $t$ = 5 $s$
Let acceleration is $a$ .
Using $v = u + a t$ $\Rightarrow 10 = 0 + a \times 5$ $\Rightarrow a = 2 m s^{- 2}$ ,
$∴ F o r c e = m a$ $\Rightarrow F o r c e = 5 \times 2 = 10$ N

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A body of mass 5 kg accelerates from rest to a velocity of 10ms−1 in 5 s. Calculate the net force acting on the body:

The correct option is C 10 NGiven m=5 kg, u=0, v=10 ms−1, t= 5 sLet acceleration is a.Using v=u+at ⇒10=0+a×5 ⇒a=2ms−2,∴Force=ma ⇒Force=5×2=10 N

A body of mass 5 kg accelerates from rest to a velocity of $10 {m s}^{- 1}$ in 5 s. Calculate the net force acting on the body:

The correct option is C 10 N
Given $m = 5$ $k g$ , $u = 0$ , $v = 10$ $m s^{- 1}$ , $t$ = 5 $s$
Let acceleration is $a$ .
Using $v = u + a t$ $\Rightarrow 10 = 0 + a \times 5$ $\Rightarrow a = 2 m s^{- 2}$ ,
$∴ F o r c e = m a$ $\Rightarrow F o r c e = 5 \times 2 = 10$ N