Calculating Force Needed to Stop a Race Car

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SUMMARY

The discussion focuses on calculating the force required to stop a race car using the principles of physics. Specifically, it examines a scenario where a race car weighing 8820 N must decelerate from a speed of 35 m/s to a complete stop over a distance of 1000 m. Participants emphasize the need to apply Newton's second law (F = ma) and the kinematic equations to determine the necessary retarding force exerted by the parachute. The conversation highlights the importance of showing work and understanding the underlying concepts for effective problem-solving.

PREREQUISITES
  • Newton's Second Law of Motion (F = ma)
  • Kinematic Equations for uniformly accelerated motion
  • Basic understanding of force and weight calculations
  • Concept of deceleration and retarding forces
NEXT STEPS
  • Calculate the deceleration required to stop the race car using kinematic equations.
  • Explore the relationship between force, mass, and acceleration in practical applications.
  • Learn how to apply the work-energy principle to solve similar physics problems.
  • Investigate the design and effectiveness of parachutes in motorsport safety.
USEFUL FOR

Physics students, automotive engineers, race car designers, and anyone interested in the application of physics to real-world scenarios involving deceleration and force calculations.

willingtolearn
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#1
A 5 g bullet leaves the muzzle of a rifle with a speed of 320 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the .82 m long barrel of the rifle ?
--------------------------
m = .005 kg
v (initial) = 320 m/s
d = .82m

F = ma
but i don't know how to find a

#2
The parachute on a race car of weight 8820 N opens at the end of a quarter-mile run when the car is traveling at 35 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1000m?
--------------------------------------
d = 1000m
Totally got no idea

Help please ? I am sick in these day, so my mind not really on it !
 
Last edited:
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Willingtolearn -

You must show some sort of work or indicate where you are stuck to receive our help.
 
Totally got no idea
 

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