Mohon bantuannya ya buat no. 21

semoga bisa membantu ya:-):-)

v = v₀ + at
   = 0 m/s + (2 m/s²)(2 s) = 4 m/s

W = ΔEK
    = 1/2 m(v² - v₀²)
    = 1/2 (5 x 10⁻³ kg) [(4 m/s)² - (0 m/s)²] = 4 x 10⁻² J