Question

A student carries 10 kgs stack of books 50 m long a soccer Field she carries the books at the constant height of 1m above the ground and walks with a constant speed how much work does the student has done?
Options are
A) 50J. C) 980J
B) 0J D) 500J

Answer 1

Answer:

As per me, The answer must be 0J because it is said that she carries the book and we know the force is acting perpendicular down the ground, Cos 90 is 0 so force comes Zero

As per Formula W = F × s

. W = 0 × 50 m

= O J

Hope it helps you ☺

Answer 2

The work done by the students is B)0J

Step-by-step explanation:

Given:

Stack of books $=10kgs$

She carries a soccer field that is 50 meters long.

Constant height $=1m$

To find:

To find how much work the student has done.

Formula used:

Work done = Force × speed

solution:

The force is perpendicular to the ground.

we know that $Cos 90^{o} =0$

so force =0

$W = 0 \times 50 m$

$= O J$

Hence, 0J is the work done by the student.