How to Find initial Velocity at 90 degrees with only a time variable given

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SUMMARY

The discussion focuses on calculating the initial velocity of a nerf dart launched vertically from a height of 1.953 feet, which impacts the ground after 0.43 seconds. The relevant physics concepts include projectile motion and kinematic equations. To find the initial velocity, one can use the equation of motion: \( h = v_i t + \frac{1}{2} g t^2 \), where \( h \) is the height, \( v_i \) is the initial velocity, \( g \) is the acceleration due to gravity (approximately 32.2 ft/s²), and \( t \) is the time of flight. This equation allows for the determination of the initial velocity required for the dart to reach the ground in the specified time.

PREREQUISITES
  • Understanding of projectile motion principles
  • Familiarity with kinematic equations
  • Knowledge of gravitational acceleration (32.2 ft/s²)
  • Basic algebra for solving equations
NEXT STEPS
  • Study the kinematic equation for vertical motion in detail
  • Learn how to derive initial velocity from time of flight and height
  • Explore examples of projectile motion problems
  • Investigate the effects of air resistance on projectile motion
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Students studying physics, educators teaching projectile motion, and anyone interested in solving real-world problems involving vertical launches and kinematics.

cloakblade5
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I am given the information that a nerf dart is launched upwards at a 90 degrees with the top of the launcher at 1.953ft and that it hits the ground .43 seconds later. I am then tasked with finding the initial velocity of the launcher and I have no idea where to start.
 
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cloakblade5 said:
I am given the information that a nerf dart is launched upwards at a 90 degrees with the top of the launcher at 1.953ft and that it hits the ground .43 seconds later. I am then tasked with finding the initial velocity of the launcher and I have no idea where to start.
Welcome to PF cloakblade5,

You must have some idea as where to start, which concept(s) are involved? What are the relevant equations?

Please be aware the according to our forum guidelines, you are required to post an attempted solution when asking for homework assistance.
 

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