You push your physics book 2.20m along a horizontal tabletop with a horizontal push of 2.20N while the opposing force of friction is 0.500N .
How much work does your 2.20N push do on the book?
How much work does the friction force do on the book?
How much work does the normal force from the table do on the book?
How much work does gravity do on the book?
What is the net work done on the book?
How much work does your 2.20N push do on the book? 2.2*2.2 J
How much work does the friction force do on the book? .5*2.2 J
the book does not move vertically, so gravity and normal force do not work.
net work= workdont-friction
Well, well, well, you've come to the right bot for some humorous answers to your physics questions. Let me entertain you with my hilarious responses!
How much work does your 2.20N push do on the book?
Oh, that pushy push has done some work indeed! The work done can be calculated by multiplying the force applied (2.20N) by the distance traveled (2.20m). So, the work done by your push is 4.84 Joules (2.20N x 2.20m). That's a lot of work for a book!
How much work does the friction force do on the book?
Ah, friction, the party pooper of the physics world! The work done by friction can be calculated by multiplying the friction force (0.500N) by the distance traveled (2.20m). So, the work done by friction is a measly 1.1 Joules (0.500N x 2.20m). It's like friction was just going through the motions, barely putting any effort!
How much work does the normal force from the table do on the book?
Oh, the normal force, always trying to be so normal! But guess what? The normal force doesn't do any work on the book! Why? Because it acts perpendicular to the displacement of the book, resulting in zero work done. It's like the normal force was on vacation, enjoying a cocktail by the beach!
How much work does gravity do on the book?
Gravity, the ever-present force! The work done by gravity can be calculated by multiplying the gravitational force (mass of the book x acceleration due to gravity) by the height (distance the book is lifted). But in this case, the book is moving horizontally, so the force of gravity doesn't do any work either! It's like gravity was too busy pulling down apples to care about the book's horizontal journey!
What is the net work done on the book?
Ah, the grand finale! The net work done on the book is simply the difference between the work done by the push and the work done by friction. So, 4.84 Joules (work done by the push) minus 1.1 Joules (work done by friction), gives us a net work of 3.74 Joules. So, the book got a positive net work done on it, like a bonus it didn't see coming!
Remember, laughter is the best medicine, even in the face of physics problems!
To find the work done, we can use the formula:
Work = Force * Distance * cos(theta)
Where:
- Work is the amount of work done
- Force is the magnitude of the force applied
- Distance is the distance over which the force is applied
- cos(theta) is the cosine of the angle between the force and the direction of motion
Let's answer each question one by one:
1. How much work does your 2.20N push do on the book?
Since the force and the direction of motion are both horizontal, the angle between them is 0 degrees. Therefore, cos(0) = 1.
So, the work done by your push:
Work = 2.20N * 2.20m * cos(0)
Work = 4.84 Joules
2. How much work does the friction force do on the book?
Similar to the previous case, the friction force and the direction of motion are both horizontal. Therefore, the angle between them is also 0 degrees.
So, the work done by the friction force:
Work = 0.500N * 2.20m * cos(0)
Work = 1.10 Joules
3. How much work does the normal force from the table do on the book?
The normal force acts perpendicular to the surface of contact, so the angle between the normal force and the direction of motion is 90 degrees. Therefore, cos(90) = 0.
Since the work done is zero, the normal force does no work on the book.
4. How much work does gravity do on the book?
Gravity acts vertically downwards, while the book moves horizontally. Therefore, the angle between them is 90 degrees, and cos(90) = 0.
Since the work done is zero, gravity does no work on the book.
5. What is the net work done on the book?
The net work is the sum of the work done by all the forces.
Net Work = Work by the push + Work by the friction
Net Work = 4.84 Joules + 1.10 Joules
Net Work = 5.94 Joules
Therefore, the net work done on the book is 5.94 Joules.