Answer:
The Force is applied for 1 sec
Step-by-step explanation:
Given as :
The Total force applied on cart = 100 Newton
The mass of cart = 20 kg
The initial velocity of cart ( v1) = 3 meter per second
The final velocity of cart (v2) = 8 meter per second
∵ Force = mass × acceleration
Or, 100 N = 20 kg × acceleration
Or, Acceleration =
Or, Acceleration = 5 Newton per kg
Again ∵ Acceleration = Rate of change of velocity
I.e Acceleration =
Or, 5 Newton per kg =
Or, Time = = 1 sec
Hence The Force is applied for 1 sec Answer