Question

A body of 4 kg mass moves at velocity 20 m/s is affected by a force 10 N in a direction opposite to its motion

Calculate :

The acceleration by which body moves

Answer 1

Answer:

f=m×a

10=4×a

a=2.5 m/s^2

but force is in opposite direction

so

a=-2.5m/s^2

Answer 2

AnsWer :

Acceleration is 2.5 m/s²

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Given :

• Mass of the body = 4 kg

• Velocity = 20 m/s

• Force = 10 N ( in opposite direction )

To Find :

• Acceleration

Solution :

$\large{\boxed{\sf{\orange{F\:=\:ma}}}}$

$\implies \small \sf Acceleration\:=\: \dfrac{F}{m}\:=\:\dfrac{10}{4}\:=\: \dfrac{5}{2}$

$\implies \large \sf {\orange{Acceleration\:=\:2.5\:m/s²}}$

☯ Now , the acceleration here is considered to be negative because the force acts in opposite direction which makes it Retardation .

• Therefore , Acceleration is $\small \sf {\blue{2.5\:m/s²}}$ .

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