Here's a breakdown:

* Force: A push or pull that can cause a change in an object's motion.

* Velocity: Describes both the speed and direction of an object.

How force changes velocity:

* Acceleration: Force causes an object to accelerate, meaning its velocity changes. Acceleration can be:

* Increase in speed: Force applied in the direction of motion.

* Decrease in speed: Force applied opposite to the direction of motion (deceleration or braking).

* Change in direction: Force applied perpendicular to the direction of motion.

Example:

* Pushing a box: You apply a force to the box, causing it to accelerate and increase its velocity.

* Stopping a car: The brakes apply a force opposite to the car's motion, causing it to decelerate and eventually stop.

* Turning a corner: Steering the car applies a force perpendicular to its motion, causing it to change direction.

Newton's Laws of Motion explain how force and motion are related:

* First Law (Inertia): An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net force.

* Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

* Third Law: For every action, there is an equal and opposite reaction.