Question

10. An object of mass 1 kg moving on a horizontal
surface with initial velocity 8 m/s comes to rest
after 10 s. If one wants to keep the object moving
on the same surface with velocity 8 m/s the force
required is
​

Answer 1

Answer: 0.8N

Explaination: the objective stopped due to frictional force

V=u+at

a=V-u/t = 0-8/10 = -0.8m/s^2

Magnitude of frictional force= ma= 1×0.8=0.8N

So the external force should be 0.8 Newton in the opposite direction to continue the motion of the object at same velocity

NOTE: The external force should be equal to frictional force , small increase will cause the acceleration and velocity will not be constant

Thank you if you like the answer please mark it brainliest