Question

Calculate the work done if a person lifts a suit case of mass 25kg and walks down a railway platform of length 62m. (g=9.8 m/s2 )
pls explain step by step

Answer 1

Given :

Mass of suitcase = 25kg

Distance travelled = 62m

Acc. due to gravity = 9.8m/s²

To Find :

We have to find work done by person.

Solution :

■ Work done is defined as the product of force and acceleration.

Mathematically, W = F d

• It is a scalar quantity having only magnitude.
• SI unit : J (joule)
• Dimension formula : [M¹L²T‾²]

In this case, only gravitational force is acting on the suitcase which is equal to mg$.$

By substituting the given values;

➠ W = F d

➠ W = (mg) × d

➠ W = 25 × 9.8 × 62

➠ W = 15190

➠ W = 15.2 kJ

Answer 2

Answer:

Work done is defined as the product of force and acceleration.

Mathematically, W = F d

It is a scalar quantity having only magnitude.

SI unit : J (joule)

Dimension formula : [M¹L²T‾²]

hope it helps uh✔️