**Calculate the speed of an 8.0 x 10^4kg airliner with a kinetic energy of 1.1 x 10^9j**

**Answer:**

KE = ½mv²

1.1 x 10^9 = ½ x 8 x 10^4 v²

v² = 2.75 x 10^4

v ≈ 165.8 m/s

**Calculate the speed of an 8.0 x 10^4kg airliner with a kinetic energy of 1.1 x 10^9j**

**Answer:**

KE = ½mv²

1.1 x 10^9 = ½ x 8 x 10^4 v²

v² = 2.75 x 10^4

v ≈ 165.8 m/s