Dina has a mass of 50 kilograms and is waiting at the top of a ski slope that’s 5.0 meters high. the maximum velocity she can reach when she skis to the bottom of the slope is meters/second.

speed will be approx 10 m/s

Explanation:

As per mechanical energy conservation we will say that if friction force is not present then total mechanical energy is always conserved

so here we will have

now we will have

now we will plug in all values in it

so here speed will be approx 10 m/s

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

the answer is a. at the equator