The energy E of a moving object is called its kinetic energy. It is calculated using the formula

E = { 1 } / { 2 } m x v ^ { 2 },

where m is the object's mass in kilograms and v is its speed in meters per second. The units of kinetic energy are

{ (kilograms) x (meters^2) / { second^2 },
abbreviated as

{ kg } x { m } ^ { 2 } x { s } ^ { 2 }.

a. Solve the given formula for m. What is the mass of an object moving at 10 m/s with a kinetic energy of

2500 kg x { m } ^ { 2 } / \mathrm { s } ^ { 2 } ?