Answer:
here on the surface of moon the gravity decreases so the frequency of oscillation will also decrease
Explanation:
As we know that frequency of oscillation of the simple pendulum is given as
here we know
g = acceleration due to gravity at the surface of the planet
L = length of the pendulum
Now we know that the pendulum is on the surface of earth then gravity is given as
now when same pendulum is taken to the surface of the moon then we have
so here on the surface of moon the gravity decreases so the frequency of oscillation will also decrease
PE = mgh₁ - mgh₂= 12.5J
h₁ = ?
h₂ = 0
h₁ = PE / mg = 12.5 / 9.8
Use the Formula PE=mgh to solve for height.
The answer would be D) Kinetic friction because kinetic means during and in motion and happening/occurring so since the box is moving now across the floor, its in motion so that's why its D).