Answer:
Explanation:
A body has acceleration when there is a change in the velocity vector, either in magnitude or direction. In this case we only have a change in magnitude. The average acceleration represents the speed variation that takes place in a given time interval.
a)
b)
Answer:
a soft foam material because soft materials absorb sound better
Answer:
B
i am not fully sure but i believe its the most accurate its either A or B
This one is a piece 'o cake if you know the definition
of a horsepower, and impossible if you don't.
It is: 1 horsepower = 746 watts
Also, remember that 1 watt = 1 joule/second
Now: Work = (force) x (distance)
To move this box 2 meters,
Work = (1,492 newtons) x (2 meters) = 2,984 joules
If you accomplished that feat in 1 second,
then you produced power of
(2,984 / 1) (joule/second) = 2,984 watts .
(2,984 watt) x (1 HP / 746 watt) = 4 horsepower .
That's the solution, applying bullet-proof math and physics to the
given data. But in the real world, I guarantee that you didn't do that.
______________________________________
By the way ... a comment regarding the terminology in the question:
The box doesn't "have a force" of 1,492 newtons. That's the force
with which you ... or a horse, or an ox ... pushed against the box
in order to move it.
(And, if I might observe, that force is about 336 pounds,
so my money would be on the horse or the ox.)
