Question

A greater force is required to impart greater velocity to an object explain briefly

Answer 1

In order to change the velocity of the object you have to apply force . Because according to Newton  first law of motion acceleration is directly proportional to the force and in order to change the acceleration you have to change the force  . So, that's mean you are changing the velocity too in order to create the acceleration  as we know that the acceleration is produced by the change of velocity . This is why changing force mean changing the velocity too , greater the force greater will be the velocity.

Answer 2

A greater force is required to impart greater velocity to an object.

According to Newton's Second Law, F=ma

we know that F α a

If force applied on an object  increases, then acceleration also increases .

As acceleration is defined as rate of change of velocity.

a=(v-u)/t

So  If acceleration increases,Then  velocity also increases.

For Example :
To move a heavy object whose initial speed is zero[u=0 m/s], we require a greater force. 
When applied force is more than static friction, the object starts to move gaining a final speed V m/s].