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1) The mass of the continent is 
2) The kinetic energy of the continent is 1683 J
3) The speed of the jogger must be 6.57 m/s
Explanation:
1)
The continent can be represented as a slab of size

and depth

So its volume is

We also know that the density of the continent is

Therefore, we can calculate its mass as:

2)
The kinetic energy of the continent is given by

where
m is its mass
v is its speed
We have already calculate its mass, while the speed is
v = 3.2 cm/year
We have to convert into SI units first, as follows:

The mass is

So, the kinetic energy of the continent is

3)
Here we have a jogger having the same kinetic energy of the continent, so

And the kinetic energy of the jogger can be expressed as

where
m = 78 kg is the mass of the jogger
v is his speed
We can therefore re-arrange the equation to find the speed of the man, and we get:

Learn more about kinetic energy:
brainly.com/question/6536722
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Answer:
Flemmings' left hand rule and Downward direction
Explanation:
The person could able to determine the path of force by applying the left-hand rule of Fleming.
Via holding the thumb the forefinger and second finger at right angles for one other
The left-hand rule is applied in the electric motors
On the other hand, the right-hand rule is applied for electric generators.
So different hands are used for the different thing as there is a difference between the cause and effect
Therefore in this case there is a left hand rule used and the direction is downward
U = mgh, Ek = 1/2*m*v^2
U = Ek (conservation of mechanical energy)
⇒ mgh = 1/2*m*v^2
∵g = 10, v = 20
⇒ 10h = 1/2*400
⇒ h = 20 (m)
Answer: Go ask your teacher and im sure if you search it on good it will answer faster than this.
Explanation: Have a great day \ and be safe