Question

A body having mass 50 kg is needed to be accelerated by 3 m/s2. Find the force required to achieve this acceleration.

Answer 1

Explanation:

Ref. image I

for block,

Ref. image II

N=ma

N=20×2

N=40N

for Boy

Ref. image

f−N=ma

f−40=50×2

f=140N

Answer 2

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☉ A body having a mass (m) 50 kg is needed to be accelerated by 3 m/s² i.e Acceleration (a) is 3 m/s².

☉ We need to find the Force (f) required to achieve this acceleration.

☉ By applying Newton's second law of motion we have :

$\longrightarrow\:\sf F = ma$

$\longrightarrow\:\sf F = 50 \times 3$

$\longrightarrow\: \underline{ \boxed{\sf F = 150 \:N }}$

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✣ Force is vector quantity.

✣ Force have both magnitude and direction.

✣ Dimensions of Force is [M L T-²]

✣ S.I unit of Force is Newton (N)

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