Cindy exerts a force of 40 newtons and moves a chair 6 meters. her brother andy pushes a different chair for 6 meters while exerting a force of 30 newtons. andy does work than cindy. the difference of their amounts of work is nm.

The difference of their amounts of work is 60 Nm.

Explanation:

Given that,

Force exerted by Cindy = 40 N

Distance = 6 m

Force exerted by her brother = 30 N

Distance = 6 m

We need to calculate the work done by Cindy

Using formula of work done

Put the value into the formula

We need to calculate the work done by her brother

Using formula of work done

Put the value into the formula

We need to calculate the difference of their amounts of work

The difference of work done is

Put the value into the formula

Hence, The difference of their amounts of work is 60 Nm.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards