What is the acceleration of the coin after being dropped?

  • Thread starter Thread starter Lesegp
  • Start date Start date
  • Tags Tags
    Acceleration
AI Thread Summary
The discussion revolves around calculating the acceleration of a coin dropped from a downward-moving lift, which accelerates at 1.5 m/s². The participant initially calculated the coin's acceleration as 11.5 m/s² but expressed doubts about this figure. Key points include the need to consider the forces acting on the coin after it is dropped, specifically gravity and the lift's downward acceleration. The net acceleration of the coin, as observed from the ground, would be the sum of gravitational acceleration (approximately 9.81 m/s²) and the lift's acceleration. Ultimately, the correct approach to the problem requires a clear understanding of the forces involved.
Lesegp
Messages
2
Reaction score
0

Homework Statement



An observer Y, on the ground floor of a building watches a glass fronted lift moving downwards .The magnitude of the acceleration of the lift as it moves downwards is 1.5m.s2 .A passenger X inside the lift drops a coin. Relative to observer Y,

Calculate the magnitude of the acceleration of the coin in ms2, after being dropped.

Homework Equations

The Attempt at a Solution


The answer that I got is 11.5m/s2 but I have my doubts about it
 
Physics news on Phys.org
Lesegp said:

Homework Statement



An observer Y, on the ground floor of a building watches a glass fronted lift moving downwards .The magnitude of the acceleration of the lift as it moves downwards is 1.5m.s2 .A passenger X inside the lift drops a coin. Relative to observer Y,

Calculate the magnitude of the acceleration of the coin in ms2, after being dropped.

Homework Equations

The Attempt at a Solution


The answer that I got is 11.5m/s2 but I have my doubts about it
We cannot help if you do not show your work.
 
Lesegp said:

Homework Statement



An observer Y, on the ground floor of a building watches a glass fronted lift moving downwards .The magnitude of the acceleration of the lift as it moves downwards is 1.5m.s2 .A passenger X inside the lift drops a coin. Relative to observer Y,

Calculate the magnitude of the acceleration of the coin in ms2, after being dropped.

Homework Equations

The Attempt at a Solution


The answer that I got is 11.5m/s2 but I have my doubts about it

What causes acceleration?
 
PeroK said:
What causes acceleration
A force applied to an object at rest causes it to accelerate in the direction of the force.
 
Lesegp said:
A force applied to an object at rest causes it to accelerate in the direction of the force.

And what force(s) act on the coin after it is dropped?
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

Relative Motion - Elevator Problem
Replies
18
Views
8K
Mechanics- Dynamics of particle moving in a straight line questions
Replies
1
Views
4K
Elevator Acceleration and Ball Gets Dropped
Replies
1
Views
2K
What is the Acceleration of a Dropped Shell?
Replies
3
Views
4K
A Bernoulli, lift and cause & effect
Replies
30
Views
4K
A question about special relativity? Car reference vs Earth reference?
Replies
4
Views
8K
Inductance problem: mass dropped above magnetic field
Replies
16
Views
2K
I Why don't we "fly up" in an accelerating elevator?
Replies
11
Views
3K
What is the Force of Tension and Acceleration in a Hanging Mass System?
Replies
4
Views
2K
How Do You Calculate Net Force and Coefficient of Friction in Physics Problems?
Replies
15
Views
3K

Hot Threads

Recent Insights

Back
Top