Question

A vehicle moving with the velocity of 25 m/s stops after 5 second. *


Identify the type of acceleration​

Answer 1

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★ Gɪᴠᴇɴ :-

• Initial velocity = 25 m/s
• Stops after 5s

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★ Tᴏ Fɪɴᴅ :-

• Type of acceleration

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★ Sᴏʟᴜᴛɪᴏɴ :-

If we need to find the type of acceleration , firstly we need to find the acceleration .

Finding acceleration using first equation of motion.

» v = u + at

Where,

• v → final velocity = 0 m/s
• u → initial velocity = 25 m/s
• a → acceleration = ?
• t → time taken = 5 s

Note :-

• Here , the final velocity will be zero because in the given question the vehicle stops after five seconds.
• Initial velocity will be 25 m/s because the vehicle starts with speed 25 m/s.

Substituting the values we have

➺ 0 = 25 + a(5)

➺ 0 - 25 = 5a

➺ - 25 ÷ 5 = a

➺ a = - 5 m/s²

Note :- Negative sign will show that the acceleration decreased that means it is negative acceleration .

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∴ Hence , the acceleration is negative type .

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Answer 2

Given

• Initial velocity = 25 m/s
• Stops after 5s

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To find

• Type of acceleration

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Solution

If we need to find the type of acceleration , firstly we need to find the acceleration .

Finding acceleration using first equation of motion.

= v = u + at

Where,

v → final velocity = 0 m/s

u → initial velocity = 25 m/s

a → acceleration = ?

t → time taken = 5 s

Look here :

Here , the final velocity will be zero because in the given question the vehicle stops after five seconds.

Initial velocity will be 25 m/s because the vehicle starts with speed 25 m/s.

Substituting the values

We have ,

==] 0 = 25 + a(5)

==] 0 - 25 = 5a

==] - 25 ÷ 5 = a

==] a = - 5 m/s²

Note :- Negative sign will show that the acceleration decreased that means it is negative acceleration .

∴ Hence , the acceleration is negative type .

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