1. A 2 kg mass is spun on a string in a horizontal circular path at a constant speed.
a. Draw the free-body diagram for the mass.
b. If the radius of the path is 0.5 m and the period of revolution is 0.25 s, what is the speed of the
mass?
What force is keeping the mass in a circular path?
I
d. What is the net force acting on the mass in the horizontal direction?
C.
2. A 1000 kg car travels around a circular track at a constant speed.
a. Draw the free-body diagram for the car (as viewed from the front of the car).
b. If the radius of the path is 200 m and the car is traveling at 25 m/s, how long does it take the car to
make a lap around the track?
C. What is the net force acting on the car in the horizontal direction?
d. What force is keeping the car in a circular path?
3. What force does the ground exert on a 1,000 kg car as it moves at 15 m/s through a dip in the road with
a path radius of 30 m?

i think it's 35 meters

answerscientific theory;

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

hope this !