Question

the object starts from rest and gains velocity of 20 m/s in 4 sec if the mass of ball is 20 g calculate the force acting on the ball

Answer 1

u =0
v =20
m= 0.02 kg
t= 4
a =5
f=ma=0 .02 ×5= 0.1N

Answer 2

HEY BUDDY...!!!

HERE'S THE ANSWER..

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▶️ Basically , we have to find Force on ball , and we'll be using

=> Force ( F ) = mass ( m ) × Acceleration ( a )

⏺️ We had given

=> mass of ball = m = 20 g = 0.02 kg

=> we have first find Acceleration , and we had give velocities and time as

=> u = 0 ( rest )

=> v = 20 m / s

=> time ( t ) = 4 s

▶️ Acceleration ( a ) = ( v - u ) / t = 20 / 4

=> a = 5 m / s^2

▶️ Now , F = m . a

=> F = 0.02 × 5

=> F = 0.1 N or 0.1 Kg m / s^2

HOPE HELPED..

HAVE A NICE DAY..

:-)