Answer: 56.72 ft/s
Explanation:
Ok, initially we only have potential energy, that is equal to:
U =m*g*h
where g is the gravitational acceleration, m the mass and h the height.
h = 50ft and g = 32.17 ft/s^2
when the watermelon is near the ground, all the potential energy is transformed into kinetic energy, and the kinetic energy can be written as:
K = (1/2)*m*v^2
where v is the velocity.
Then we have:
K = U
m*g*h = (m/2)*v^2
we solve it for v.
v = √(2g*h) = √(2*32.17*50) ft/s = 56.72 ft/s
3.87 i think but if its not correct then let me know.
Answer:
a. 
b. 
c. 
Explanation:
Use Gravitational Force:
Use values given to have the results.
b.
Use m as the mass of the Moon. Using values of a. and m you have the answer.
c.
Use M mass of the planet. Use value of a and Mass of Planet.
