Answer:
625 N
Explanation:
The impulse given to the nail is equal to the change in momentum of the hammer:
where
F is the force exerted by the hammer
is the time of contact
is the mass
is the change in velocity of the hammer
Substituting the data and re-arranging the equation, we can find the force:
<span>Operant conditioning by Burrhus Frederick
Skinner, showed that people learn to behave in certain ways because of
reinforcement. This a product of a psychology school of thought, behaviorism,
which comes in the notion that whatever a person behave is what matters instead
of his mind, pioneered by John B. Watson. If a person wants to retain the
behavior, then he will do positive reinforcements example, positive stroking.
If the behavior is undesired and needs to be exterminated, then a punishment will
be instilled.</span>
Vertical force on the box=mg
<span>the component of gravity parallel=mg*SinTheta </span>
<span>the component of gravity normal=mg*CosTheta </span>
<span>frictional force up the plane: mg*cosTheta*mu max, but if it is sitting still, it is equal and opposite to mg*cosTheta (it cannot be greater than this or it would go up the plane).</span>
Answer:
A The total amount of matter cannot be created
or destroyed.
Explanation:The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
