Question

A metal block of dimensions 10 cm × 4 cm × 2 cm has relative density 19.6. Calculate the (i) mass (ii) weight of metal block in SI units. take g = 10 m/s square​

Answer 1

Answer:

Correct Question:-

A metal block of dimensions 10 cm × 4 cm × 2 cm has relative density 19.6. Calculate the (i) mass (ii) weight of metal block in SI units. Take g = 10 m/s$^{2}$

Given:-

Dimensions of metal block = 10 cm × 4 cm × 2 cm

Relative density = 19.6

To find:-

• Mass of metal block.
• Weight of metal block in SI units.

Solution:-

Since dimensions of metal block = 10 cm × 4 cm × 2 cm.

It's volume = 10 cm × 4 cm × 2 cm

$80 \: cm {}^{3}$

Relative density = 19.6

Therefore, density of metal block

$= 19.6 \: gcm {}^{ - 3}$

Mass of metal block

= Velocity × density

$= 80 \: cm {}^{3} \times 19.6 \: gcm {}^{ - 3} \\ \\ = 1568 \: g$

So, it's mass in SI unit

$= \frac{1568 g}{1000} \\ \\ = 1.5689 \: kg$

Now, weight of metal block = m × g

$= 1.568 \: kg \: \times 10 \: m \: s {}^{ - 2} \\ \\ = 15.68 N \:$

$\fbox {Note}$

Only the SI units or those recognised for the use with SI are used to express quantities. The equivalent units are expressed in parentheses.

For example, melting point of ice is 273 K. However, as celsius units are allowed. therefore, we can express melting point of ice as 273 K (0° C).

Answer 2

Answer:

15.68N

Explanation:

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