Answer:
4 m/s
Explanation:
If you pick the points (2,8) and (3,12) on the graph, y2-y1 over x2-x1, you get 4 over 1 which equals 4.
Answer:
83.97 m
Explanation:
Without any other external force causing motion in the horizontal direction, it is the frictional force that brings the box to rest. The frictional force has to match the force due to deceleration experienced by the truck to not move.
So,
Frictional force = ma
Then, we calculate frictional force now,
In the vertical direction, the force balance has the weight and the normal reaction equal
N = W = mg
And frictional force = μN = μmg
where μ is the coefficient of friction = 0.3
ma = μmg
a = μg = 0.3 × 9.8 = 2.94 m/s²
Then, using the equations of motion, we obtain the distance over which this deceleration stops the truck
u = initial velocity of the truck = 80 km/h = 22.22 m/s
v = final velocity of the truck = 0 m/s, since the truck comes to rest
a = - 2.94 m/s² (negative sign because it's a deceleration)
x = distance covered during this deceleration = ?
v² = u² + 2ax
0² = 22.22² + 2(-2.94)(x)
5.88x = 493.73
x = 83.97 m
Kinetic and potential energy he has the ability to make a meal and because he is making the meal
There
are five layers of the atmosphere and these are; troposphere, stratosphere,
mesosphere, thermosphere and exosphere. The first layer, troposphere, is where
we are able to do most of our activities. This is where we can see the formation
of clouds, the production of rain, hail, snow and other weather phenomenon.
Also, this layer is where the greatest amount of air pressure because most of
the molecules of air are in this area. Like us, air has also mass and the
pressure is brought down by the earth’s gravity causing an increase in weight
exerted on you as you descend lower into the atmosphere. So, as you enter into
the other layers of atmosphere above the troposphere, the air pressure starts
to decrease. <span>Below the atmosphere
is the hydrosphere. This is where all liquid forms are located. And since the
seawater has a greater mass than air, it has the greatest pressure. </span>
Explanation:
It would be easier to lift the hammer, during the nailing, in Pluto than on earth but it would require more hammer jacks to drive the nail through the floorboard. This is because the gravity on Pluto is weaker than on Earth. The additional acceleration of the hammer (due to gravity) would be lesser hence you would require to put in a bit more energy for the downforce of the hammer.
On the sun, it would be difficult to lift the hammer than here on earth. This is because the gravity of the sun is much greater than on earth. If you would manage to lift the hammer, the downforce of the hammer on the nail would have an added acceleration of the gravity of the sun hence the force of the hammer hitting the nail would be higher hence rapidly driving it through the floorboard.
Learn More:
For more on gravity check out;
brainly.com/question/9934704
brainly.com/question/3034702
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