Concrete Block Incline acceleration question

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Homework Help Overview

The discussion revolves around a physics problem involving a concrete block sliding down a smooth incline. The problem is set in the context of kinematics and dynamics, specifically focusing on the acceleration of the block and the distance it travels over a specified time period.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to calculate the acceleration of the block using gravitational force components. Some participants question the correctness of the calculations presented, while others suggest the necessity of a free body diagram to clarify the forces acting on the block.

Discussion Status

The discussion is ongoing, with participants actively questioning the validity of the calculations and emphasizing the importance of visualizing the problem through a free body diagram. There is no explicit consensus on the correctness of the initial calculations.

Contextual Notes

Participants are encouraged to consider the assumptions made in the problem, such as ignoring air resistance and the smoothness of the incline, which may affect the analysis.

nwmyname
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Homework Statement


A concrete block of mass 25kg is placed on a smooth slope that makes an angle of 30 degrees with the horizontal. Ignoring the effects of air resistance, calculate
a) the acceleration of the block as it slides down (g = 9.81 ms-2)
b) the distance the block moves in 3 seconds

Homework Equations

The Attempt at a Solution


w = mg
w = 25 * 9.81 = 245.25N
Wsin(theta) = 245.25 * sin(30) = 122.625N
122.625N / 25kg = 4.905ms-2?
 
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so, what is the problem you are facing?
 
nwmyname said:
Is it correct?
Looks correct to me.
 
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Likes   Reactions: drvrm
nwmyname said:
Is it correct? @Verma S.P.

whether it is correct or not will decide your 'free body diagram! pl. draw a free body diagram for the forces operating/acting on the block !
 

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