Answer :

• (C) 20 N

Given :

• Mass of a particle (m) = 5 kg
• Initial velocity (u) = 18 m/s
• Final velocity (v) = 26 m/s
• Time (t) = 4 seconds

To Find :

• Magnitude of the force

Solution :

Using formula :

• Force = Mass × Acceleration

We know that,

• v = u + at

Substituting the required values, we get:

→ 26 = 18 + a (4)

→ 26 - 18 = a(4)

→ a = 8/4

→ a = 4 m/sec²

→ Force = mass × acceleration

→ Force = 5 × 4

→ Force = 20 N

Hence,

• Magnitude of force is 20 N