After the box comes to rest at position x1, a person starts pushing the box, giving it a speed v1. when the box reaches position x2 (where x2> x1), how much work wp has the person done on the box? assume that the box reaches x2 after the person has accelerated it from rest to speed v1. express the work in terms of m, v0, x1, x2, and v1.

Explanation:

First, the box goes from position x=0 to x=x1, so, the work made by the friction is calculated as:

where is the force of friction, the displacement, m the mass, V is the speed in rest and the initial speed.

V is equal to zero, so:

it means that the force of friction is equal to:

On the other hand, when the box goes from position x=x1 to x=x2, the work-energy theorem said that:

Where is the work done by the person.

Then, solving for :

Finally, replacing by , we get:

it would be c. predictability

the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.