Which one of these motions is at constant acceleration?

AI Thread Summary
Motion A, a car moving at constant speed and direction, is characterized by zero acceleration, while motion C, a moon orbiting a planet, is often misunderstood as having constant acceleration due to its circular path. The discussion highlights a disagreement between a student's interpretation and their teacher's assertion that the moon's orbit represents constant acceleration. Participants argue that the teacher's reasoning may be flawed, as real orbits are elliptical rather than perfect circles. The conversation emphasizes the importance of understanding the nuances of acceleration in different types of motion. Ultimately, the consensus leans towards motion A being a valid answer, despite the teacher's claim.
Lilygu3
Messages
1
Reaction score
0

Homework Statement


Which one of these motions is at constant acceleration?
A) A car moving at a constant speed and constant direction.
B) A train making stops along its route.
C) A moon orbiting a planet.

Homework Equations

The Attempt at a Solution


I believe that A is an acceptable answer, since the car is at a constant acceleration of zero.
My teacher says C is the only correct answer.

Thank you for your input!
 
Physics news on Phys.org
Your teacher needs to go back to school.
 
  • Like
Likes azizlwl
I agree. The teacher seems to be entertaining the notion that the orbit of the moon is a perfect circle, which it ain't.
 
How the teacher can select C? Have you asked what is the reason?
 
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 hanged mass'

Thread 'A cylinder connected to a hanged 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

Are suvat equations valid in 2 dimensional motion for constant acceleration?
Replies
5
Views
1K
Why would this be accelerating positively?
Replies
6
Views
905
Circular motion — the acceleration is not constant?
Replies
1
Views
1K
Help with question on motion: Avoiding a rear-end collision
Replies
6
Views
3K
Relation between the velocity vector and the acceleration vector of an object
Replies
1
Views
641
Circular motion/ speed increases at a constant rate
Replies
7
Views
2K
Acceleration in uniform circular motion is uniform or non-uniform?
2
Replies
55
Views
3K
Constant Acceleration Ratio to Constant Velocity
Replies
12
Views
2K
Non-Constant Acceleration Problem
Replies
5
Views
2K
Constant velocity, constant acceleration?
Replies
11
Views
3K

Hot Threads

Recent Insights

Back
Top