0
Why is it possible for the objects on a table to remain on the table when the table cloth was pulled away quicly?
Wiki User
∙ 11y ago
Newton's first law of motion states that a body will maintain its current state of rest or uniform motion unless acted upon by an external force. Therefore, the magnitude of the force generated by the tablecloth on the dishes and the duration of the force determines whether the dishes fall off with the table cloth.
The force that the tablecloth generates on the dishes when it starts to move is the frictional force. Therefore, the lower the coefficient of static friction of the tablecloth (e.g. plastic has a lower coefficient of friction than Velcro), the lower the magnitude of the force generated (i.e. pulling out a Teflon table cloth is much easier than pulling out a thick wool tablecloth).
Also, the shorter the duration of the force (i.e. pulling the tablecloth off quickly), the lower the cumulative velocity resulting from the momentary acceleration (v = a*t, even if acceleration is large, a short time will reduce final velocity significantly).
Therefore, lower coefficient of friction results in the reduction of force, the reduction of force leads to reduced acceleration (F = m*a), and reduced acceleration coupled with a short time period gives a lower final velocity.Hence it is possilble to pull a tablecloth off a table without disturbing the dishes on it.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoIt works on the theory that objects at rest tend to remain at rest until influenced by an outside force.
If you jerk the tablecloth away fast enough objects on the table don't realize they've been influenced.
Add your answer:
Earn +20 pts
When no outside forces act on asystem of objects what do the objects do?
If there are no outside forces acting on a system of particles the total momentum of the system will remain constant; i.e. the center of mass of the system will remain at rest or move at constant velocity.
Do metal objects get charged by conduction?
When metal objects conduct electricity the electricity just passes through them, it does not remain to impart an electrical charge.
What are objects remain at constant velocity unless an unless an unbalanced force acts?
An object in motion.
What forces act apon objects in motion?
If an object is already in motion, in principle it requires no force to remain moving.
An unbalanced force will not change an objects motion?
If the forces on an object are unbalanced then the objects motion will change. It will start accelerating in the direction of the resultant force. Only objects that have balanced forces will remain in the same motion (stationary or moving at a constant speed).
Why will more dense water remain at the bottom of the cup?
The force of gravity acts to pull as much mass as possible to the lowest location possible; this happens when the denser substances or objects sink, and the less dense substances or objects rise, making room for the denser ones.
What is the branch of math which studies characteristics of objects which remain unchanged after the objects have been distorted?
it starts with a t
What is wrong when flahers stay on even when you pull the fuse?
If the flashers remain on after you have pulled the fuse, you may have pulled the wrong fuse or it has somehow been bypassed.
What is the tendency for objects that are at rest to remain at rest?
The term you are looking for is 'inertia'.
What is the measure of an objects ability to remain at rest or keep moving?
inertia
Why do objects remained at rest?
As you can observe, they will not ALWAYS be at rest. Objects have a tendency to remain at rest, because:* Inertia means that if no force acts on an object, it will remain at rest if it was at rest; or, if it was moving, it will continue moving at the same velocity. * Friction forces will usually slow objects down.
Why does white objects remain cooler than objects painted other colours when exposed to thermal radiation?
This is because of natural sunlight
When no outside forces act on asystem of objects what do the objects do?
If there are no outside forces acting on a system of particles the total momentum of the system will remain constant; i.e. the center of mass of the system will remain at rest or move at constant velocity.
Do metal objects get charged by conduction?
When metal objects conduct electricity the electricity just passes through them, it does not remain to impart an electrical charge.
What happens to a beaker of cool water placed in a vacuum chamber?
If an object is in a space it is not a vacuum. No true vacuum exists. I will adress your question assuming a partial vacuum, and assuming the objects will not expand/ be pulled apart by suction forces. The objects will not be able to transfer heat energy through convection and therefor will remain at the same temperature unless they touch, or radiate heat, or are hit by radiation.
To help manage risk it is essential that you that can increase levels of risk?
remain alert to conditions or objects
What are objects remain at constant velocity unless an unless an unbalanced force acts?
An object in motion.
