Question

Force acts of an object of mass 4kg and changes its velocity from 10m/s to 20m/s in 5 second . Find the magnitude of the force?

Answer 1

here is your answer

initial velocity :- 10 m/s

final = 20m/s

t = 5 sec.

so.

acceleration= change in velocity/ time interval

so, a = 20-10/5 = 2m/sec²

so, we know that :- f = ma

so, f = 4 × 2 = 8 Newton..

hope it helps you ☺️

Answer 2

Answer :- 8N

Given :-

• Mass = 4 kg
• u = initial velocity = 10 m/s
• v = final velocity = 20 m/s
• Time = 5 sec

To Find :-

• Magnitude of force ( F = M x A )

Solution :-

Force = Mass x Acceleration

Mass = 4 kg

Acceleration = ?

---------------------

Acceleration = v - u / t

= 20 - 10 / 5

= 10/5

= 2 m/s

--------------------

Now,

F = 4 x 2

F = 8 N