It's also possible that you have the correct application on your PC, but .obj files aren't yet associated with it. In this case, when you try to open a .obj file, you can tell Windows which application is the correct one for that file. From then on, opening a .obj file will open the correct application. Click here to fix .obj file association errors
Best Answer: Covering the brake, is to be able to stop quickly in an emergency situation. Controlled braking, is to apply the brakes as hard as you can without locking the wheels. Threshold braking, means to utilizing the maximum potential of your brakes, or in other words, braking to the threshold of locking-up.
Reapply pressure until you feel one of the wheels start to lock up, ease off slightly and continue this movement, tracking the threshold until you stop. As the vehicle slows, you can brake harder before lock-up will occur. The more slippery the surface, the less you will be able to push the brake before a wheel locks. The skill in threshold braking comes from being able to linger just short of lock-up. To threshold brake well requires much effort and concentration.