How Much Work Must Be Done to Accelerate a Particle $3.5 \times 10 ^{- 14 }\mathrm {~kg}$

Short Answer

How much work must be done to accelerate a particle of mass $3.5 \times 10 ^{- 14 }\mathrm {~kg}$ from a speed of $1.2 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ to a speed of $1.9 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } ?$ (c = 3.0 × 10⁸ m/s)