I bought some new rotors for the front of my ford explorer and i bought it for a 02 but my explorer is a 01 on the door and its making a rough sound when i put on the breaks like a rock is in their but there isnt a rock or any wear marks what could it be

Sounds like left front loose wheel bearing knocking ABS sensor out of range causing ABS light to come on and causing grind noise at same location. Grinding noise is probably rotor rubbing on calipar.

Sounds like you need new engine mounts

It can be in the moving parts like a Hub bearing or Constant velocity joint. You may be able to feel the roughness in the wheel assembly if the wheel is jacked off the ground and the tire is spun slowly.
It is probably doing this all along and when the brake tightens against the Rotor, the drive parts transfer a shift in force from the bottom of the weight bearing hub to the side where the Caliper is hung. The excess play sort of twists the rotor, hub, and CV joint from their normal positions when the Caliper grabs the rotor.

check front end bushings and suspension setup sounds like bushings are worn out.or shocks are needing replaced

Explorers have a bad rep for brake calipers getting stuck. Which in turn can ruin your rotors. Do you hear a grinding noise when you stop or a clicking/squeeking noise when hit your brakes? If so check the brake caliper and the rotors. If the rotors are rough they may need to be turned or purchased new ones. Sounds like a brake caliper to me though. Hope this helps!

Remove the front drive shaft is the only way.

Sometimes this would require a little "elbow greese"lol. If you have correctly taken everything off then try spraying some penatrating lube on the studs, front,and back of the rotor.

Sounds like the detent rollers on the door hinge are dry and need some grease (if the door has proper clearance on the front fender...check this first) spray some white lithium grease spray on the hinges and related moving parts on the door hinges upper and lower and the plastic guide that goes in the door... Let me know how it goes.
KEN

a big hammer is about all you need

IF ROTORS WERE CUT TO FAST IT WILL CAUSE A CLICKING NOISE LOOK AT ROTOR AND SEE IF IT LOOKS LIKE IT HAS A SCREW STYLE SURFACE