Question

if a worker is holding a box of mass 200 kg to a height of 2 m for 10 s, what is the work done by the worker? ​

Answer 1

Step-by-step explanation:

Answer:

4,000 joules.

Explanation:

Question says that, A worker is holding a box of 200kg to a height of 2m for 10 seconds.

Find the work done by the worker.

Here,

The work done is a potential energy.

We know,

→ P.E.(potential energy) = mgh

Where,

m is the mass of the object.

g(acceleration due to gravity) = 9.8m/s

h is the height.

Substituting the given values,

→ 200 × 2 × 10

→ 4000 joules.

∴ Work done my the worker is 4,000 joules.

__________________________

NOTE:

Potential energy is a stored energy of a object due to its position.

P.E. is calculated by the formula = mgh

Where, m is mass, g is acceleration due to gravity, and h denotes the height.

UNITS:

P.E. is measured by joules.

m = kg.

g = m/s

h = metres.

Answer 2

Explanation:-

Question says that, A worker is holding a box of 200kg to a height of 2m for 10 seconds.

Find the work done by the worker.

Here,

The work done is a potential energy.

We know,

→ P.E.(potential energy) = mgh

Where,

• m is the mass of the object.
• g(acceleration due to gravity) = 9.8m/sh is the height.

Substituting the given values,

→ 200 × 2 × 10

→ 200 × 2 × 10→ 4000 joules.

______________________________________

NOTE:

• Potential energy is a stored energy of a object due to its position.P.E. is calculated by the formula = mghWhere, m is mass, g is acceleration due to gravity, and h denotes the height.

UNITS:

P.E. is measured by joules.

• m = kg.
• g = m/s
• h = metres.