Question

9.
A force of 20 N produced 2 m/s? acceleration in a body. Then the mass of the body i
a) 10 kg
b) 20 kg
c) 25 kg
d) 15 kg
2
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Answer 1

Given :

• Force (F) = 20 N
• Acceleration (a) = 2 m/s

To find :

• Mass of the body (m)

According to the question,

As we know that the formula for force is,

→ Force = Mass × Acceleration

Or,

→ F = ma

Substituting the values,

→ 20 = m × 2

→ 20 ÷ 2 = m

→ 10 = m

.°. The mass of the body is 10 kg..

So,option (a) is correct..

____________________________

Other Formula :

Newton's first equation of motion :

• v = u + at

Newton's second equation of motion :

• s = ut + ½ at²

Newton's third equation of motion :

• v² = u² + 2as

Answer 2

Given:-

• Magnitude of force provided (F) = 20 N
• Acceleration becomes (a) = 2 m/s²

To Find:

Mass (m) of the body.

We know,

F = ma

where,

• F = Force,
• m, a = mass and acceleration respectively.

∴ 20 N = m(2 m/s²)

→ m = (20 kg m/s²)/(2 m/s²)

→ m = 10 kg (Answer)

∴ Mass of the body was 10 kilograms.