a constant force acting on a body of mass 4kg, changes its velocity from 2m/s to 4m/s. what is the force??
Answers
Explanation:
A constant force acting on a body of mass 4kg changes its velocity from 2m/s to 4m/S in 4 seconds. What is the force?
The force acting on the body can be solved by using Newton’s 2nd law of motion. The formula is Force = mass * acceleration. The mass = 4kg while the value of the acceleration a = (v2 - v1) / t.
Solving for the acceleration a
a = (v2 - v1) / t
a = (4m/s - 2 m/s) / 4s
a = 2 m/s / 4s
a = 0.5 m/s^2
Solving for the net force F that acts on the body
Force = mass * acceleration
Force =4 kg * 0.5 m/s^2
Force = 2 N
The net force is equal to 2 N.
Answer:
2N
Explanation:
initial velocity(u)=2m/s
final velocity(v)=4m/s
time(t)=4s
mass(m)=4kg
now,
acceleration(a)=(v-u)/t
=(4-2)/4
=0.5m/s^2
again,
force(F)=ma
=4*0.5
=2N