A force can cause an object to change its speed and direction.

Here's why:

* Speed: A force can push or pull an object, causing it to accelerate (speed up) or decelerate (slow down).

* Direction: A force can also change an object's direction of motion. Think about pushing a ball to the right – you're applying a force that changes its direction.

This is a fundamental concept in physics, known as Newton's Laws of Motion.