Tire out of balance, bent wheel, defect in tire, or suspension parts worn.
Gradually increasing in speed, to be performed with increasing speed
momentum As the speed of a rolling ball is increasing, the increasing speed is accompanied by: a. increasing momentum.
http://www.2carpros.com/topics/shakes1.htm
Probably wheel balance.
By increasing or decreasing the speed of the tail rotors. This unbalances the torques acting on the helicopter and causes it to spin.
The term for increasing speed is accelerating.
As the speed of the particles increase, it causes them to collide with the other particles in which they are reacting with more frequently, increasing the reaction rate.
if this happens at a certain speed it's probably the alignment of the tires.
Thankfully mine does not shake, thanks for asking. This is really not enough information to diagnose the problem. Does it shake the same every time or does it not shake or shake less sometimes? Is the "check engine" light on? Is there a speed where the shake is more pronounced? Does it have to be full throttle acceleration or does it shake under light acceleration too? Is there a noise accompanying the shake? If you accelerate around a corner is the shake any different? Left or right turn make a difference?
Acceleration refers to increasing or decreasing speed. When an object changes its speed, it is said to be accelerating, whether the speed is increasing or decreasing. Changing direction is related to a different aspect of motion called velocity.
Velocity is the measure of increasing and decreasing speed. For example... on a velocity graph, if the object being measured is gradually getting faster the line will go up. If it is getting slower, it will go down, if it is staying at a constant speed, the line will be straight
Common cause could be a tire out of ballance or a bad tire, meaning the inside is separating. If your tire is out of balance the vibration you get will be at a particular speed usually over 45-50 mph, depends on how far out of balance the tire is. If you have a bad tire the vibration may start gradually then get worse as you speed up. Note: These are the common causes that I am famillar with. The best thing to do is take it to a mechanic to be checked.