Force acts on an object may change in terms of direction, shape, and speed. Let's discuss each of these changes in detail:

Direction:
- Force can change the direction of an object. For example, if a ball is kicked towards the right, a force is applied in that direction. If another force is applied in the opposite direction, the ball's direction will change, and it will start moving towards the left.
- Similarly, if an object is moving in a straight line and a force is applied perpendicular to its direction of motion, the object will change its path and move in a different direction.

Shape:
- Force can also change the shape of an object. This change is particularly observed in elastic materials such as rubber bands or springs. When a force is applied to stretch or compress these materials, they change their shape temporarily. Once the force is removed, they regain their original shape.
- Another example is when a force is applied to bend a metal wire. The wire undergoes a change in shape due to the force applied to it.

Speed:
- Force can alter the speed of an object. If an unbalanced force is applied to a stationary object, it will start moving and gain speed over time.
- Similarly, if a force is applied in the opposite direction to the object's motion, it will slow down and eventually come to rest.
- Additionally, force can also change the speed of a moving object. For instance, if a car is traveling at a certain speed and the accelerator is pressed, the force provided by the engine will increase the speed of the car.

In summary, force can change the direction, shape, and speed of an object. These changes occur due to the interaction between the applied force and the object. Understanding these changes helps us comprehend the effect of forces on objects and their resulting motion.