Sometimes broken engine mounts, rough engine performance problems, worn out harmonic balancers, and transmission problems. People expect to get a specific answer for all of their questions, especially in automobiles, but in reality, an automobile is a complex piece of machinery that needs very precise inputs and calibrations to run properly. Thus, there are many different arrays of problems that can cause similar symptoms. Other causes at speed are bent wheel, tire out of balance. warped rotor, etc.
If you are referring to vibration when you hit your brakes in a car, it could be that your rotors are warped or your wheels could also be out of balance, or both.
What are the causes and sources of vibration on diesel
If the tires are properly balanced plug tires should not cause a vibration.
It is probably an out of balance tire, next check wheel bearings.
Resonance.
noise and frequency are made a vibration
Have it checked out by a mechanic. The most likely thing is the car just needs a good tune up to replaced plugs and wires that are wearing out.
When an engines motor mounts go bad the vibration is felt throughout the entirety of the car. The motor mounts should be inspected to see if the rubber inserts are cracked.
tension on the motor causes a slight vibration in the on the frame of the vehicle
The vibration was so severe in the front end, I had trouble steering the car. I could only feel the vibration when the car accelerated. Earthquakes cause a distinct vibration of the earth.
a vibration occurring
When one part of a vibration causes air particles to spread out, they form ararefaction