truw
truw
Motion which starts and stops regularly.
it is vandals and spammers it is vandals and spammers
In physics, this jerk is called "acceleration". As a simplified explanation, it means that the velocity changes.
You do not. You wait until the train stops and then step out without needing to run.
Friction slows or stops motion when objects rub together.
Your probably spotting
Newton's First Law is called his First Law of Motion. It states that an object in motion tends to stay in motion unless influenced by something else that slows or stops its motion. Likewise, an object at rest - not moving - tends to stay at rest unless influenced by something else that starts it moving.
Yes, a switch is a device that stops and starts current flow in a circuit.
The starter.
friction by applying the brakes? When you apply the brakes, there are pads on either side of the metal part of the wheel, they squeeze together tighter and tighter until the wheel stops turning, which stops the motion of the bike.
There are two main types of friction: kinetic and static. Static friction resist impending motion: the force needed to break before something starts sliding. Static friction stops acting upon the object once it starts moving. Kinetic friction resist motion: the force that is opposing existing motion, i.e. object has already started sliding.