Final answer:
To build a jump for your bike, you can use an inclined plane and a wheel and axle as simple machines.
Step-by-step explanation:
To build a jump for your bike using the pile of dirt, you can use a few simple machines. One simple machine you can use is an inclined plane, which can be formed by shaping the dirt into a ramp. The inclined plane will make it easier for your bike to go up the ramp and gain height before jumping. Another simple machine you can use is a wheel and axle, which can be created by attaching a rod or pipe to a wheel made of wood or metal. The wheel and axle can be used to create a pulley system that can lift or move heavy objects, such as shaping the dirt or building the jump structure.