Question

Class 9 S. Chand What will be the mass of an object whose weight is 49 N? (Given : g = 9.8 m/s^2)

Answer 1

Given

• Weight (w) = 49 N
• Acceleration due to gravity (g) = 9.8 m/s²

To Find

• Mass (m)

Formula Used

• F = m × g

Solution

➯ 49N = m × 9.8

➯ m = 49/9.8

➯ m = 5.0 kg

Therefore, the mass of that object will be 5.0 kg

Additional Information

• The Force which attracts two bodies in the universe is because of the force which is called Gravitational Force
• According to Newton, all the objects in this universe attracts each other and he said that it attracted with a force which is directly proportional to the product of their masses & inversely proportional to the square if distance between them.

Important Formulae

• F = m × g
• v = u + at
• S = ut + ½at²
• v² - u² = 2as

Answer 2

We have been told that the weight is $\sf{49N}$. And the acceleration is $\sf{9.8 m/{s}^{2}}$.

And are being asked to find the mass.

We know tue formula for finding the weight. We will use the same to find out the mass.

$\large{\boxed{\implies{\sf{F = m \times g}}}}$

Putting up the values we get :

$\small{\longrightarrow{\sf{49N = m \times 9.8}}}$

$\small{\longrightarrow{\sf{m = \dfrac{49}{9.8}}}}$

$\small{\longrightarrow{\sf{m = \cancel{\dfrac{49}{9.8}}}}}$

$\small{\longrightarrow{\sf{m = 5.0 kg}}}$

So the mass of the object is 5.0 kg

Supplementary information :

• Mass is the amount of matter.

• Acceleration is the rate of speed.

• Weight is the measurement of force or garvitational force earth requires to pull our body onto itself.