Select all that apply.

A latter education question and answer requested students to mention what they admit is the most important point for a student to do if they wanted to accomplish success. The one that response stood out from the rest was practice. Successful persons absolutely not born successful; they become successful with hard work and dedication. This is how you can get your goals. followed below some question and answer examples that you could utilise to improve your knowledge and gain insight that will assist you to maintain your school studies.

Question:

Select all that apply.No work is accomplished in which of the following situations?
a boy carried a 4.0-newton box 3.0 meters across the room at a constant velocity.
a boy pushes on a box weighing 4.0 newtons and it doesn’t move.
a boy lifts a 4.0-newton box to a height of 1.0 meter.

Answer:

Answer:

a boy pushes on a box weighing 4.0 newtons and it doesn’t move.

Explanation:

The definition of work is the following:

where

F is the force applied

d is the displacement

is the angle between the direction of the force and of the displacement

From the formula, we notice that if there is no displacement (d=0), then the work done is zero (W=0).

The choices given are:

a boy carried a 4.0-newton box 3.0 meters across the room at a constant velocity.  –> in this case, work is done (displacement is non-zero)

a boy pushes on a box weighing 4.0 newtons and it doesn’t move.  –> in this case, NO work is done (because the displacement is zero)

a boy lifts a 4.0-newton box to a height of 1.0 meter. –> in this case, work is done (displacement is non-zero)

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So, the correct choice is

a boy pushes on a box weighing 4.0 newtons and it doesn’t move.

They would probably hopefully assist the student resolve the question by working with the questions and answer examples. You would probably then have a discussion with your classmate and continue the school learning by studying the subject mutually.

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