What is the maximum force that the student could apply to a 220kg object on the same surface before the box would start to slide

Force needed to move the box is 2,158.2N

Explanation:

Step one:

We are given that the mass =220kg

The force needed to overcome friction is the same as the weight of the box

Step two :

So from

F=mg

W=mg

Substitute

W=220*9.81

W=2,158.2 N

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .