Question
Download Solution PDFA body of mass 4 kg accelerates from 15 m/s to 25 m/s in 5 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Force: Force is a push or pulls on an object. A force can cause an object to accelerate, slow down, remain in place, or change shape.
Force exerted = mass x acceleration
⇒ F = m × a
Acceleration = (Final velocity - Initial velocity)/time
⇒ a = (v2 - v1) / t
Where F is the force exerted on the body, m is the mass of the body, a is the acceleration of the body, v2 is the final velocity, v1 is initial velocity and t s time.
Calculation:
Given data:
the mass of the body m = 4 kg, Final velocity v2 = 25 m/s, Initial velocity v1 = 15 m/s, time t = 5 s.
We know that,
⇒ Acceleration = (Final velocity - Initial velocity)/time
a = (25 - 15)/5 m/s2 = 2 m/s2
Also,
⇒ Force exerted = mass x acceleration
⇒ Force = 4 × 2 = 8 N
- So option 2 is correct.
Last updated on Jun 26, 2025
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