Why are we thrown forward when brakes are applied?

 Object at rest are tend to remain at rest, and object in motion tend to remain in motion. They maintain their states in which they are currently present. We notice this when we stand in moving bus and the driver suddenly applies the brakes. Our feet are in contact with the floor of the bus, but the body moves forward. Because of the same effect when the car takes a turn we feel a force pushing us in the opposite direction. However, the concept of inertia is used specially to keep the satellites and space in their orbit around the earth.