Register
The spring of a dart gun exerts a force on a 0.02 kg dart as it is launched from the gun with 4.00 J of KE. At what velocity does the dart come out of the gun?
198k views
18 votes
The spring of a dart gun exerts a force on a 0.02 kg dart as it is launched from the gun with 4.00 J of KE. At what velocity does the dart come out of the gun?

User Dan Smart
by
4.5k points

1 Answer

5 votes

Let's see

  • KE=1/2mv²

m is mass and v is velocity

  • 2KE=mv²
  • 4(2)=0.02v²
  • 8=2v²/100
  • 2v²=800
  • v²=400
  • v=20m/s
User Xzhsh
by
4.5k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.5m questions

5.9m answers

Other Questions

How does the value of the electrostatic force vary with the value (how many) of the charges?
A car is moving 14.4 m/s when it hits the brakes. It slow from 78.8 m, which take 9.92s. It then accelerates at 1.83 m/s 2 for 4.50 s. What is the total displacement?
A 3.63.kgkg chihuahua charges at a speed of 3.3m/s3.3m/s. What is the magnitude of the average force needed to bring the chihuahua to a stop in 0.50s0.50s
5. How does the existence of humans compare with Earth's age?
A charge Q is uniformly spread over one surface of a very large nonconducting square elastic sheet having sides of length d. At a point P that is 1.25 cm outside the sheet, the magnitude of the electric
Link Copied!