Question

an object of mass 100 kg changes its velocity from 2 metre per second to 10 metre per second in 8 seconds. calculate force acting on an object​

Answer 1

Answer:

f =100 N

Explanation:

f= ma

m = 100kg

a = Vf - Vi/t

a = 10 - 2 / 8

a = 1ms-²

f = ma

f = 100 × 1

f = 100 N

Answer 2

Answer:

$\bigstar{\bold{Force=100\:N}}$

Explanation:

$\Large{\underline{\underline{\bf{Given:}}}}$

• Mass of the body( m )  = 100 kg
• Initial velocity ( u ) = 2 m/s
• Final velocity ( v ) = 10 m/s
• Time taken ( t ) = 8 s

$\Large{\underline{\underline{\bf{To\:Find:}}}}$

• Force acting on the object ( F )

$\Large{\underline{\underline{\bf{Solution:}}}}$

→ First we need to find the acceleration (a) of the body

→ Acceleration of the body is given by

  a = ( v - u )/t

→ Substituting the datas,

  a =  ( 10 - 2 )/8

  a = 1 m/s²

→ By Newton's second law of motion, force is given by

 Force = Mass × Acceleration

→ Substitute the datas,

  Force = 100 × 1

  Force = 100 N

$\boxed{\bold{Force=100\:N}}$

$\Large{\underline{\underline{\bf{Notes:}}}}$

→ Newton's second law of motion state that the rate of change of momentum is directly proportional to the applied force and the change takes place in the direction of force.

  F = m a

→ The unit of force is Newton ( N) in S.I system and dyne in CGS system.