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Chapter 3: Problem 6

Describe several things you have done today that involved doing work. Are you doing work right now?

Short Answer

Expert verified
Answer: Today, I lifted a backpack by applying an upward force, pushed a door open with horizontal force, and walked up the stairs by exerting upward force with my feet. Currently, if I am typing or writing, I am doing work by applying force on the keys or the pen. If I am sitting still without exerting force on any objects, I am not doing work in the scientific sense.

Step by step solution

01

Identify activities that involved doing work

Reflect on the activities you've done today. Identify the ones that involved applying a force on an object and causing a displacement. Some examples of such activities could be: - lifting a backpack - pushing a door open - walking up the stairs - pulling a drawer open - throwing a ball
02

Describe the work done in each activity

Describe how force was applied in each activity and how the objects were displaced. Include information about the direction of the displacement in relation to the applied force. For example: - Lifting a backpack: applied an upward force to counteract gravity, causing the backpack to be displaced vertically upwards. - Pushing a door open: applied a horizontal force in the direction of the door's rotation, causing the door to pivot and move away from the hinge. - Walking up the stairs: applied an upward force with feet against the stairs, causing the body to be displaced vertically.
03

Assess whether you're doing work right now

Consider your current state and actions. If you are applying a force on an object and causing it to be displaced, then you are doing work in the scientific sense. For example: - If you are typing an answer on a computer or writing with a pen, you are doing work on the keys or the pen by applying a force that displaces them. - If you are sitting still and not actively moving or exerting force on any objects, you are not doing work in the scientific sense.

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