I’ve answered this before so I know the question is missing an
important given and that given is: <span>1 has an
empty trailer and the other has a fully loaded one.
So, it would be the fully loaded trailer that would take a longer distance to
stop because a lot of weight is being pulled, and when the brakes are started,
the fully loaded trailer is more like pushing against the truck.</span>
Answer:
The correct answer is the third option: The kinetic energy of the water molecules decreases.
Explanation:
Temperature is, in depth, a statistical value; kind of an average of the particles movement in any physical system (such as a glass filled with water). Kinetic energy, for sure, is the energy resulting from movement (technically depending on mass and velocity of a system; in other words, the faster something moves, the greater its kinetic energy.
Since temperature is related to the total average random movement in a system, and so is the kinetic energy (related to movement through velocity), as the thermometer measures <u>less temperature</u>, that would mean that the particles (in this case: water particles) are <u>moving slowly</u>, so that: the slower something moves, the lower its kinetic energy.
<u>In summary:</u> temperature tells about how fast are moving and colliding the particles within a system, and since it is <em>directly proportional</em> to the amount of movement, it can be related (also <em>directly proportional</em>) to the kinectic energy.
Kinetic energy = mass time squared speed divided by 2
W=mv^2/2 = 50*10*10/2 = 2500 J
D. Was a leader in the woman's suffrage movement
Answer:
The ball would hit the floor approximately after leaving the table.
The ball would travel approximately horizontally after leaving the table.
(Assumption: .)
Explanation:
Let denote the change to the height of the ball. Let denote the time (in seconds) it took for the ball to hit the floor after leaving the table. Let denote the initial vertical velocity of this ball.
If the air resistance on this ball is indeed negligible:.
The ball was initially travelling horizontally. In other words, before leaving the table, the vertical velocity of the ball was .
The height of the table was . Therefore, after hitting the floor, the ball would be below where it was before leaving the table. Hence, .
The equation becomes:
.
Solve for :
.
In other words, it would take approximately for the ball to hit the floor after leaving the table.
Since the air resistance on the ball is negligible, the horizontal velocity of this ball would be constant (at ) until the ball hits the floor.
The ball was in the air for approximately and would have travelled approximately horizontally during the flight.