True / False questions related to Newtonian Mechanics

AI Thread Summary
The discussion revolves around true/false questions related to Newtonian Mechanics, addressing concepts such as acceleration in inertial frames, the relationship between work and speed, and the nature of kinetic energy. Key points include the assertion that acceleration remains constant across inertial reference frames, while the work needed to lift a mass does not depend on the speed of lifting. The work done by a constant force is correctly defined as the product of force magnitude and distance. Additionally, it is noted that kinetic energy can change without net work being done, and that more power is required when lifting a box quickly compared to slowly. The conversation emphasizes the importance of understanding these fundamental principles in physics.
Sumbhajee
Messages
15
Reaction score
0

Homework Statement


These are all true/false questions.

1. The acceleration of an object is same in all inertial reference frames.

2. The work required to lift a mass one meter depends on the speed at which it is raised..

3. The work done by a constant force acting on an object is equal to the magnitude of the force times the distance the object moves.

4. A particle's kinetic energy can change without having any net work done it.

5. Less power is required while lifting a box up quickly than while slowly lifting it.

6. A simple machine cannot reduce the work required to do a task.

Homework Equations





The Attempt at a Solution



I have attempted everything I could think of for these true/false questions and I cannot seem to find the correct answer. Please help.
 
Physics news on Phys.org
If everything you tried is wrong...then the opposite must be true.

Sorry. Paraphrasing George Costanza.

Seriously, what have you specifically attempted? Let's start with that.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Newtonian Mechanics (true or false)
Replies
6
Views
6K
Series of True or False questions related to Forces and FBDs
Replies
2
Views
2K
Conservation of Energy when lifting a box up off the floor
Replies
5
Views
2K
Lifting an object, kinetic energy, work and forces
Replies
11
Views
5K
Newtonian mechanics; word problem; calculate forces
Replies
7
Views
3K
Classical mechanics: motion and acceleration
Replies
7
Views
2K
How to differentiate b/w a conservative/non-conservative force?
Replies
3
Views
2K
Can Forces Acting on an Object Be Zero?
Replies
5
Views
1K
Calculate tilt angle of a bar lifted via two ropes on fixed points
Replies
7
Views
3K
How is a system in equilibrium when net force and net work are both zero?
Replies
9
Views
2K

Hot Threads

Recent Insights

Back
Top