Dumbwaiters An upward force of 600n acts on a 50-kg dumbwaiter, what is the acceleration?
One newton is the force that will accelerate one kg. at a rate of one
meter per second per second. The force F equals the product of
mass and acceleration; that is: F= ma. We are given F and m, so
we need to find a. From the formula, a = F divided by m, or a = F/m
Then a = 600/50 = 12 meters per second per second. BUT
if it accelerates upward, we need to subtract from this value
the downward acceleration due to gravity (g), which equals
9.8 meters per second per second. So the net upward acceleration
is 12.0 - 9,8, or 2.2 meters per second per second.
Hope this answers your question.
What year did dumbwaiters start being installed in residential homes?
According to dictionary.com, the origin of the word comes from around the time of 1744, but at that time I believe it referred to the American version of "Lazy Susans" rather than the British version of a lift.
Thomas Jefferson is credited with the invention of a dumbwaiter system for his Monticello home:
"In the Dining Room at Monticello on each side of the fireplace, Jefferson placed mechanical dumb waiters which permitted servants to send wine bottles up from the cellar. It is possible that Jefferson saw a similar apparatus in the Café Mecanique, located in the Palais Royal."
