When two forces act in the same direction, one needs to add these two forces. The overall force is the net force acting on the object.Know More
By definition, a force is a push or pull exerted on an object. The Newton is the unit of measurement one uses to denote the strength of a force. Likewise, a vector can represent a force. A vector is a line with an arrow, where the length of the arrow denotes the force amount, and the arrow point represents the direction.
Depending on the amounts and directions of forces exerted on an object, one can either add or subtract these forces. If two forces are in the same direction, then one adds them to find the net force, which is the vector sum of these forces. However, when two forces act in opposite direction, one has to subtract the lesser force from the larger one to find the resulting force. The resultant is the direction of the larger of these two forces.
When two forces are opposite and equal in amount, the net force is zero. These two opposite forces are called balanced forces because they do not cause a change in the object’s motion. If two forces acting on an object are different in amounts, then they are unbalanced forces and will affect the object’s motion.Learn more about Physics
Warm air constantly changes elevations in the atmosphere, which leads to harsh weather conditions such as thunderstorms, hurricanes, tornadoes and windy conditions. Poor weather conditions are the direct result of air rising after it is heated up by warm ocean currents.Full Answer >
When an inflated balloon is placed in cold water, it shrinks. This happens because the air inside the balloon occupies a smaller volume when the temperature is decreased, thus causing the walls of the balloon to collapse.Full Answer >
According to the Scientific American, during a nuclear meltdown, core material overheats, either due to a runaway reaction or loss of coolant. The extreme temperatures can cause damage to the reactor, partially melt the nuclear fuel and contaminate any remaining coolant with radioactive material. In addition, some reactor designs use pressure vessels, and a meltdown can increase pressure enough to cause an explosion or release radioactivity from the containment vessel.Full Answer >
In some cases, an attempt to claim a child as a dependent when another person has already claimed him results in rejection of the electronic submission, according to About.com. If the IRS accepts the return or the second parent mails a return claiming the same child as a dependent, the IRS is likely to require an audit over dependents.Full Answer >