a body was falling under gravity at velocity 25 meter per second what force is required to stop the body in 2 second if mass of body is 20 kg
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Initial Velocity, u = 25m/s
Final Velocity, v = 0
Time, t = 2 sec
g = 10m/s^2
Mass = 20kg
Weight = mg = 200 N
So, a force of 200N will be required to overcome the weight of the body,
now to stop the body,
Force = ma = m(v-u)/t = 20 (0-25)/2 = -250N
The negative sign denotes the opposite direction.
So the total force required Is 200N + 250N = 450N
Final Velocity, v = 0
Time, t = 2 sec
g = 10m/s^2
Mass = 20kg
Weight = mg = 200 N
So, a force of 200N will be required to overcome the weight of the body,
now to stop the body,
Force = ma = m(v-u)/t = 20 (0-25)/2 = -250N
The negative sign denotes the opposite direction.
So the total force required Is 200N + 250N = 450N
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