Question

A 3 years old baby pulling a toy car on the floor, the baby exerted force in the direction of the displacement of car. what would be nature of work done - positive or negative work?

Answer 1

Answer:

negative because old baby is positive in nature but forcing a car is negative... hop u understand if u so plz mark me as brainliest

Answer 2

Given:

A 3 years old baby pulling a toy car on the floor, the baby exerted force in the direction of the displacement of car.

To find:

What would be nature of work done - positive or negative work?

Calculation:

The general expression of work done :

$\boxed{ \bold{ work = F \times d \times \cos( \theta) }}$

• "F" is the applied force.
• "d" is the displacement of the body.
• $\theta$ is the angle between force vector and displacement vector.

So, when the baby applies force along the direction of displacement of car, the value of $\theta$ is zero degree (0°)

$\therefore \bold{ work = F \times d \times \cos( {0}^{ \circ} ) }$

$\implies\bold{ work = F \times d \times 1 }$

$\implies\bold{ work = F \times d }$

Since, "F" and "d" are positive terms, the value of work done will be positive.

Hence, work done is positive.