Question

8000j of work is done by a machine to lift a mass
100 kg vertically upwards Calculate the
height
the
mass is
lifted
g=10ms^-2​

Answer 1

Answer:

W=f*s

8000=ma*s

8000=100*10*s

8000=1000s

s=8000/1000

s=8m

Answer 2

AnswEr :

• The height of a lift is 8 m.

Explanation :

We are given with the work done and machine to lift a mass, that is,

• Work done = 8000 J.

• Mass = 100 kg.

We have to find out the height of a lift.

Now,

We know that the work done is equal to the potential energy, such that,

• Work done = Potential energy$.$

As we are given with work done by a machine and mass we know the required formula,

→ P.E = mgh

Here,

• P.E is the potential energy.

• m is the the mass.

• g is the acceleration due to gravity.

• h is the height.

Substituting the given values in the formula,

⟶ 8000 = 100 × 10 × h

⟶ 8000 = 1000 × h

⟶ 8000 = 1000h

⟶ 8000 - 1000h = 0

⟶ -1000h = -8000

⟶ 1000h = 8000

⟶ h = 8000/1000

⟶ h = 8

Hence, the height of a lift is 8 m.