Answer:
here it is...
Explanation:
The friction between the two surfaces is because of the interlocking of the irregularities of the two surfaces. During sliding, contact points do not get enough time to get interlocked properly. Therefore, less friction. ... This explains why sliding friction is less than static friction.
When the distance between the source and the observer is DEcreasing, the observer sees light that has a<em> shorter wavelength</em> than the light actually had when it left the source.
It doesn't matter how the distance between them is decreasing. The source could be moving toward the observer, the observer could be moving toward the source, or they could both be moving in a way that makes the separation between them decrease as time goes on. The result is the same.
(When this is used in Astronomy and Astrophysics, the big trick is: How does the observer know what the wavelength actually WAS when the light left the source ?)
I'm pretty sure it's D. negative acceleration
Answer:
The Kinetic energy of the Cheeto truck = 130,500 J
Explanation:
The Formula for Kinetic energy is
K.E = 1/2 x M x V^2
So in this Situation Mass(M) is 290kg
Velocity (V) is 30 m/s
Inputting these values into our equation gives us
K.E = 1/2 x 290 x 30^2
30 times 30 = 900
So K.E = 1/2 x 290 x 900
Simplifing this we get : K.E = 290 x 450
So K.E = 130,500 Kgm^2/s^2
Now the unit's Kgm^2/s^2 scientific name is Joule and symbol (J).
So K.E = 130,500 J
P.S: Oh man, now I have a craving for some Cheetos!
Answer:
313.6 m downward
Explanation:
The distance covered by the bullet along the vertical direction can be calculated by using the equation of motion of a projectile along the y-axis.
In fact, we have:
where
y(t) is the vertical position of the projectile at time t
h is the initial height of the projectile
is the initial vertical velocity of the projectile, which is zero since the bullet is fired horizontally
t is the time
a = g = -9.8 m/s^2 is the acceleration due to gravity
We can rewrite the equation as
where the term on the left, , represents the vertical displacement of the bullet. Substituting numbers and t = 8 s, we find
So the bullet has travelled 313.6 m downward.