Answers:
a) 122.5 m
b) 50 m
Explanation:
Here we are dealing with projectile motion, where we can use the following two equations that model the parabolic motion of the stone after being thrown from the window:
(1)
(2)
Where:
is the height of the stone when it hits the ground
is the initial height of the stone
is the initial velocity of the stone
since we are told the stone was thrown horizontally
is the time the stone is in air
is the horizontal distance the stone travelled
Knowing this, we can answer the questions:
a)Initial height of the stone:
In this case we will isolate from (1):
(3)
(4)
(5) This is the initial height
b) Horizontal distance:
In this case we will use equation (2):
(6)
(7) This is the horizontal distance
Answer:
865.08 m
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 243 m/s
Height (h) of the cliff = 62 m
Horizontal distance (s) =?
Next, we shall determine the time taken for the cannon to get to the ground. This can be obtained as follow:
Height (h) of the cliff = 62 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =?
h = ½gt²
62 = ½ × 9.8 × t²
62 = 4.9 × t²
Divide both side by 4.9
t² = 62/4.9
Take the square root of both side.
t = √(62/4.9)
t = 3.56 s
Finally, we shall determine the horizontal distance travelled by the cannon ball as shown below:
Initial velocity (u) = 243 m/s
Time (t) = 3.56 s
Horizontal distance (s) =?
s = ut
s = 243 × 3.56 s
s = 865.08 m
Thus, the cannon ball will impact the ground 865.08 m from the base of the cliff.
Answer:
destroys habitats is the main one
Explanation:
eye sore can be one and it can burst causing a flood is also one :)
Answer:
Explanation:
The force exerted between two current-carrying wires is given by
where
is the vacuum permeability
I1 and I2 are the two currents
L is the length of the segment of wire on which we want to calculate the force
r is the distance between the wires
In this problem we have:
Substituting into the formula, we find:
And since the direction of the two currents is opposite, the force between the wires is repulsive.
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