Rank the objects below from least to greatest momentum:

A car travelling down the highway
A book falling from a table
A butterfly flying through the air
The school building

The correct order of momentum from least to greatest is given as

School building < Butter fly < Book falling from table < Car travelling on highway

Explanation:

As we know that the momentum is defined as the product of mass and velocity

Here we have to compare the momentum of objects by the mass and velocity both

A car travelling down the highway

A book falling from a table

A butterfly flying through the air

The school building

out of above all car is heavy as well as moving with high speed on highway so it will have maximum momentum, then school building is heavy in mass but its speed is zero so its momentum is minimum and least

Then out of butter fly and the book the book is much heavy than butter fly so momentum of book is more than butter fly

So here correct order is

School building < Butter fly < Book falling from table < Car travelling on highway

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