Question

The velocity of an
object changes from 50 Ms to
60 mls in 20 sec. What is the average
acceleration of the object?
A 1 Ms2
B 2 Ms s2
C 0.5 m/s²
D 5.5m/s2​

Answer 1

Given:-

• Initial velocity ,u = 50m/s

• Final velocity ,v = 60m/s

• Time taken ,t = 20 s

To Find:-

• . Acceleration ,a

Solution:-

As we know that acceleration is defined as the rate of change of velocity at per unit time.

• a = v-u/t

where,

a is the acceleration

v is the final velocity

u is the initial velocity

t is the time taken

Substitute the value we get

→ a = 60-50/20

→ a = 10/20

→ a = 1/2

→ a = 0.5m/s²

Therefore,the acceleration of the object is 0.5 m/s².

Hence , Option C is the correct answer .

Answer 2

Answer:

Given :-

• The velocity of an object changes from 50 m/s to 60 m/s in 20 seconds.

To Find :-

• What is the average acceleration of the object.

Formula Used :-

To find acceleration we know that,

$\boxed{\bold{\large{a\: =\: \dfrac{v - u}{t}}}}$

( where,

• a = Acceleration
• v = Final velocity
• u = Initial velocity
• t = Time )

Solution :-

Given :

• v = 60 m/s
• u = 50 m/s
• t = 20 seconds

【 According to the question by using the formula we get 】

⇒ a = $\dfrac{60 - 50}{20}$

⇒ a = $\sf\dfrac{\cancel{10}}{\cancel{20}}$

➠《 a = 0.5 m/s² 》

$\therefore$ The average acceleration of the object is 0.5 m/s² .

Correct options is option no (c) $\large{\green{\checkmark}}$

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