I think it is b , that what I would i pick
Answer:
<em>The cantaloupe has a speed of 117.6 m/s</em>
Explanation:
<u>Free Fall Motion</u>
It occurs when an object falls under the sole influence of gravity. Any object that is being acted upon solely by the force of gravity is said to be in a state of free fall. Free-falling objects do not face air resistance.
If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is
.
The final velocity of a free-falling object after a time t is given by:
vf=g.t
The cantaloupe has been dropped from rest. We are required to find the speed after t=12 seconds.
Calculate the final speed:
vf=9.8 * 12 = 117.6 m/s
The cantaloupe has a speed of 117.6 m/s
Answer:
Explanation:
Let the magnetic field be
B = 
For magnetic force , the expression is
F = L ( I x B )
= 1.5 ( 24i x
)
F = 36 B_y k - 36 B_z j
Given
F = 3 j + 2 k
Equating equal terms
we have
B_y = 2 / 36 , B_z = - 3 / 36
Now the direction of current is changed to y direction
so F = ![1.5[ 24j \times ( B_xi +B_yj +B_z k )]](https://tex.z-dn.net/?f=1.5%5B%2024j%20%5Ctimes%20%28%20B_xi%20%2BB_yj%20%2BB_z%20k%20%29%5D)
Given
F = - 3 i - 2 k
Equating equal terms
we have
B_x = 2 / 36 , B_z = - 3 / 36
So B = 2/36 i + 2/36 j - 3/ 36 k
Magnitude of B
= 4.1 / 36 T
Answer:
A. It will increase
Explanation:
Area of a wire is:
R = ρL/A
where ρ is the resistivity of the wire,
L is the length of the wire,
and A is the cross-sectional area.
If A decreases, while ρ and L stay the same, then R will increase.
Answer:
3.6m
Explanation:
if you are at a building that is 46m above the ground, and the professor is 1.80m, the egg must fall:
46m - 1.80m = 44.2m
the egg must fall for 44.2m to land on the head of the professor.
Now, how many time this takes?
we have to use the following free fall equation:

where
is the height,
is the initial velocity, in this case
.
is the acceleration of gravity:
and
is time, thus:

clearing for time:

we know that the egg has to fall for 44.2m, so
, and
, so we the time is:

Finally, if the professor has a speed of
, it has to be at a distance:

and t=3.002s:

so the answer is the professor has to be 3.6m far from the building when you release the egg