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Simple Energy Problem

  • Thread starter SamTsui86
  • Start date
31
0
1. Homework Statement

A uranium projectile fired from a tank in Iraq has a volume of 351.00 cm3 and an intital kinetic energy of
2.00 × 103 kJ. What is the muzzle velocity of the tank's gun (m/s) ?

The density of uranium is 18.95 g/cm3

2. Homework Equations

Density = mass / volume

KE= 1/2 m v^2

3. The Attempt at a Solution

Using volume and density I figured out the mass
m = dv m = (18.95)(351) = 6651.45 g
plug in kinetic energy formula

KE = 1/2 m v^2 2000000 J = 1/2 6651.45 v^2

so v^2 is 601.37 and therefore v = 24.53 m/s

It kept saying that I am wrong, please help
1. Homework Statement



2. Homework Equations



3. The Attempt at a Solution
 

Answers and Replies

mukundpa
Homework Helper
524
3
Whether all quantities are taken same unit system?

what about gram and jule?
 

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