Question

A particle has an acceleration of
1.8Km/min2. Its value in S.I unit is
2.0,5m/sec 2. 30m/sec
3. 108m/sec 4. None of these​

Answer 1

Answer:

Acceleration of particle

$= 1.8km \: \: {min}^{ - 2} \\ = 1.8 \times \frac{1000}{60 \times 60} m \: \: {sec}^{ - 2} \\ =0.5m \: {sec}^{ - 2}$

Answer 2

Answer: 2.  (0.5 $m/s^{2}$)

Explanation:

• The concept of how the term acceleration is derived needs to be understood.
• To calculate the speed or velocity we need to find the distance covered by an body per unit time.
• After this the concept of acceleration comes into play which says that the change in velocity per unit time is termed as acceleration. It can be either negative or positive.
• The standard unit of acceleration is $m/s^{2}$.
• The acceleration here is 1.8 $km/min^{2}$.
• In standard unit,

             $1.8\frac{1000}{3600} m/s^{2}$

        ⇒ 0.5 $m/s^{2}$.

• Hence, the correct answer is 0.5 $m/s^{2}$.

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