<span>It would be hotter near the Earth's equator and colder near Earth's poles</span>
Answer:
58515.9 m/s
Explanation:
We are given that



We have to find the speed (vf).
Work done by surrounding particles=W=0 Therefore, initial energy is equal to final energy.





Using the formula


Where mass of sun=


In this three body system total kinetic energy remains constant:


If we assume that upwards movement is positive and downwards movement is negative the formula is:

Formula for kinetic energy is:

Now we have:

We got two solutions: positive and negative. The speed is 5.04 m/s and direction can be upwards and downwards.
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Answer:
A student could conclude that the cart gained momentum as it rolled down.
Explanation:
If the cart was allowed to roll down the ramp from rest, it means that the initial velocity of the cart is zero (0). Also, if the final velocity of the cart became 25 cm/s, it means that the velocity of the cart increased from 0 to 25 cm/s.
Therefore, A student could conclude that the cart gained momentum as it rolled down.