Question

for how long should a force of 100 Newton acts on a body of 20 kg so that it acquires a velocity of 100metre per second​

Answer 1

Answer:

Given,  

Force, F = 100 N  

Mass of the body, m = 20 kg  

 Therefore, Acceleration is given by,  

Acceleration, a = F/m = 100/20 5m/s^2  

Now, Initial velocity, u = 0  

Final velocity, v = 100 m/s  

Acceleration, a = 5m/s^2  

Therefore, Time for which the force is applied,  

t = v-u/a = 100 - 0/5

= 20s