Consider the following three cases:.
Case 1: A person holds her arm at an angle of 30 degrees above the horizontal (hand is higher than the shoulder).
Case 2: A person holds her arm straight out parallel to the ground.
Case 3: A person holds her arm at an angle of 30 degrees below the horizontal (hand is lower than the shoulder).
(a) In which of the following cases is the torque about the shoulder due to the weight of the arm the greatest?
(b) Briefly explain your answer to the previous question.
(c) If the person lets her arm swing freely from an initial straight-out parallel-to-the-ground position, when is the angular acceleration of the arm about the shoulder the greatest?
(d) Briefly explain your answer to the previous question.

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray