11. a student lifts a 25 kg mass a vertical distance of 1.6 m in a time of 2.0 seconds. a. find the force needed to lift the mass (in n).

245 Newtons

Explanation:

The force needed is simply the same as that of gravity for an object with mass 25. That is: mass times g, which in this case gives 25 kg times 9,8 m/squared seconds. And that equals 245 Newtons.

A student lifting a mass of 25Kg in vertical distance of 1.6 m in a time of 2.0 seconds requires a force of 245.25 N to lift the mass.

Explanation:

Given:

Mass m=25 kg

distance d =1.6 m  

time= 2.0 seconds  

To find  :

Force required to lift the mass=?

We know

where  

g is a gravitational foce and is a constant

Also  

substituting the given values,

Result:

Thus ,a student lifting a mass of 25Kg in vertical distance of 1.6 m in a time of 2.0 seconds requires a force of 245.25 N to lift the mass.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.