Magnitude and direction of acceleration

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SUMMARY

The discussion focuses on calculating the magnitude and direction of acceleration for a car with a mass of 1.3x104 kg that stops from an initial speed of 35 km/hr over a distance of 15 meters. The correct approach involves using the SUVAT equations to determine uniform acceleration, which is essential for solving part (a) of the problem. Additionally, the braking force can be calculated using Newton's second law, which relates acceleration to force. The participants emphasize the importance of providing a complete solution attempt to facilitate assistance.

PREREQUISITES
  • Understanding of SUVAT equations for uniformly accelerated motion
  • Knowledge of Newton's second law of motion
  • Basic algebra for solving equations
  • Familiarity with unit conversions (e.g., km/hr to m/s)
NEXT STEPS
  • Learn how to apply SUVAT equations in various motion scenarios
  • Study Newton's second law and its application in calculating forces
  • Practice converting units, particularly speed from km/hr to m/s
  • Explore examples of uniform acceleration problems in physics
USEFUL FOR

Students studying physics, particularly those tackling problems related to motion and forces, as well as educators looking for examples of applying fundamental physics concepts in real-world scenarios.

AshleyAg
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Homework Statement


A car with a mass of 1.3x10^4kg is initially moving at 35 km/hr in a straight line when the car comes to a complete stop at 15m. What is the magnitude and direction of acceleration?b) the magnitude and direction of the breaking force c) thetime required to stop

Homework Equations

The Attempt at a Solution


I got a) 20 m/s b) I didn't understand & c) I didn't understand eathier[/B]
 
Last edited:
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Hi! You need to include an attempt at a solution, or we can't help you with the problem. Please edit your post and give us any attempts you've made. :smile:
 
Technically, the question ought to state that acceleration is uniform. Do you know the SUVAT equations?

A) asks for the magnitude and direction of an acceleration. Your proposed answer is a speed. If you meant 20m/s2 then I don't think that is right (and you still have not specified a direction). Please post the equations you applied and show your working.

For b), what equation connects acceleration with force? (And it's braking force, not breaking force. Nothing gets broken in the process.)
 

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