Rotational motion (flywheel) problem

AI Thread Summary
To solve the problem of determining the energy required to travel 350 km while overcoming a frictional force of 450 N and accelerating from 0 to 95 km/h twenty times, one must consider the conversion of energy into rotational kinetic energy. The total energy needed includes work done against friction and the energy required for acceleration. The work done against friction can be calculated using the formula W = F × d, where F is the frictional force and d is the distance. Additionally, the kinetic energy for acceleration can be calculated using the formula KE = 0.5 × m × v^2, where m is mass and v is final velocity. The combined energy from both components will provide the total energy required for the journey.
Physics news on Phys.org
The question is bascially asking how much energy is required to travel 350km, with a frictional force of 450N while acclerating from 0 to 95km/h twenty times. You know that all the energy will be 'stored' as rotational kinetic energy and will be converted to work done at the end of the trip.

-Hoot:smile:
 
Thank you.
 

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 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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

Motion of Sphere Rolling Down Rotating Cone
Replies
9
Views
2K
Calculating Flywheel Inertia Using Conservation of Energy Equations?
Replies
14
Views
2K
Rotating simple harmonic oscillator
Replies
11
Views
1K
What is the torque exerted by the flywheel on the machine?
Replies
5
Views
4K
Show that the flywheel inside the train counteracts lean in a curve
Replies
4
Views
2K
Satellite mechanics: linear and rotational momentum
Replies
35
Views
3K
Rotational kinetic energy(flywheel) problem
Replies
4
Views
3K
Oscillatory motion problem: Bicycle wheel rotation oscillation
Replies
17
Views
889
Is Throwing a Knife with No Spin Actually More Effective?
Replies
4
Views
2K
Angular Momentum and Flywheel Energy problem?
Replies
3
Views
3K

Hot Threads

Recent Insights

Back
Top