Question on car speed and distance.

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SUMMARY

The discussion centers on a physics problem involving a car moving with constant acceleration, covering a distance of 58 meters in 6.2 seconds, reaching a speed of 54 km/h at the second point. The calculated speed at the first point is 30.33 km/h, derived from the average speed formula and unit conversions. The participants express uncertainty about determining the distance from the first point where the car was at rest, indicating a need for clarity on kinematic equations relevant to the problem.

PREREQUISITES
  • Understanding of kinematic equations for constant acceleration
  • Ability to perform unit conversions between meters per second and kilometers per hour
  • Familiarity with average speed calculations
  • Basic knowledge of motion concepts in physics
NEXT STEPS
  • Study the kinematic equations, particularly the equations of motion for constant acceleration
  • Learn how to derive initial velocity from final velocity and acceleration
  • Practice problems involving average speed and distance calculations
  • Explore the concept of instantaneous speed versus average speed in motion analysis
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Students studying physics, particularly those focusing on kinematics, as well as educators seeking to clarify concepts related to motion and acceleration.

wolfgangjt
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Homework Statement


A car moving at constant acceleration covers the distance between two points 58m apart in 6.2 seconds. its speed as it passes the second point is 54 km/hr. what is the speed at the first point? at what prior distance from the first point was the car at rest?

Homework Equations


Conversions.
58m/6.2s =9.36m/s 9.36 m/s converts to .5616km/hr. 54 km/hr * .5616km/hr = 30.33 km/hr

The Attempt at a Solution


The speed at the first point is 30.33 KM/Hr. Not sure how to arrive at the second part.
 
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wolfgangjt said:

Homework Statement


A car moving at constant acceleration covers the distance between two points 58m apart in 6.2 seconds. its speed as it passes the second point is 54 km/hr. what is the speed at the first point? at what prior distance from the first point was the car at rest?


Homework Equations


Conversions.
58m/6.2s =9.36m/s 9.36 m/s converts to .5616km/hr. 54 km/hr * .5616km/hr = 30.33 km/hr

The Attempt at a Solution


The speed at the first point is 30.33 KM/Hr. Not sure how to arrive at the second part.

What kinematic equations are you using?

And what have you been given in the question?
 

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