Which object hawhich object has the most gravitational potential energy?
a. a 30 kg suitcase at a height of 1.5 m
b. a 20 kg suitcase at a height of 2 m
c. a 30 kg suitcase at a height of 2 m
d. a 20 kg suitcase at a height of 1.5 ms the most gravitational potential energy?

Hi, we can do a comparisson. Recall that potential energy is defined as m*g*h where m is the mass in kg, g is gravitational acceleration (9.8m/s^2) and h is the height therefore:
A:B:C:D=30×g×1.5:20×g×2:30×g×2:20×g×1.5 since all of them have the term of g, we can "kill" the term hence we have that:
A:B:C:D=45:40:60:30  hence we know the option c has the most potential energy

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

Because the sun is the biggest and if the sun orbits the earth we will be dead probably