Answer:
1.24 m/s²
Explanation:
From Newton's law,
ma = F-W ................. Equation 1
Note: The weight of the rock act downward
Where m = mass of the rock, a = acceleration of the rock, F = Upward force applied to the rock, W = weight of the rock.
Make a the subject of the equation,
a = (F-W)/m................... Equation 2
Given: F = 46.2 N, W = 40 N, m = 5 kg.
Substitute into equation 2
a = (46.2-40)/5
a = 6.2/5
a = 1.24 m/s²
Hence the acceleration of the rock in the planet = 1.24 m/s²
