Could be a rod knock. Your bearings slipping in the engine.
Bad ball joint
Check the drive axle for a broken and leaking boot or bad CV joint.
You need to get your car checked.
u knocking on it
You have one or more tires out of balance.
kinetic (movement) energy is converted to sound energy due to the collision.
Could most possibly the CV joint (constant-velocity joint)
many many things, Loose lug nuts which lets wheel make knocking noise. Engine will make a knocking noise if it is really low on oil. Some timing belts make a knocking, slapping noise just before they break.These are just a few examples . Have someone ride in car with you as you duplcate the noise and see if they can determine which part of the vehicle it is coming from.
your car being broke get it checked out
Because it just does. That's why.
You forgot to let your wife in
Get it fixed.