What Is the Acceleration of a Rock at the Apex of Its Flight?

  • Thread starter Thread starter soulja101
  • Start date Start date
  • Tags Tags
    Velocity
AI Thread Summary
When a rock is thrown straight up, its acceleration at the apex of its flight, where its instantaneous velocity is zero, is 9.8 m/s² due to gravity. This acceleration remains constant regardless of the rock's velocity at that point. The only force acting on the rock at the apex is gravity, which pulls it downward. Therefore, the acceleration is solely determined by gravitational force, with no other forces affecting it. The conclusion confirms that the acceleration at the apex is indeed 9.8 m/s².
soulja101
Messages
61
Reaction score
0

Homework Statement


When a rock is thrown straight into the air what is its accleration at the top of its flight when its instantanoues velocity is zero?


Homework Equations



g=9.8N/Kg

The Attempt at a Solution


Is the accelration 9.8m/s
 
Physics news on Phys.org
The acceleration is dependent on the sum of all the forces acting on the rock. What you have is 9.8 from the force of gravity. As long as there are no other forces on the rock...
 
thanks a lot so that's right
 
yep. That is right.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Questioning the Solution for Elevator vs Rock Problem
Replies
7
Views
2K
Vertical flight with air resistance
Replies
11
Views
3K
Projectile Motion Kinematics: A catapult launches a rock....
Replies
5
Views
4K
Air resistnce in projectile motion decreasing time of flight
Replies
1
Views
3K
Rock dropped inside of a moving vehicle
Replies
11
Views
2K
1-D Projectile Motion: Throwing a Rock
Replies
5
Views
7K
Rock Thrown from 32m Building: Vertical Velocity at 6m Question
Replies
4
Views
1K
Distance, Time, and Temperature question
Replies
3
Views
1K
Is My Calculation of Centripetal Acceleration and Tangential Velocity Correct?
Replies
12
Views
1K
Understanding the Symmetry of Motion in a Parabolic Trajectory
Replies
10
Views
2K

Hot Threads

Recent Insights

Back
Top