Answer:
20 J
Explanation:
First find the acceleration:
F = ma
20 N = (10 kg) a
a = 2 m/s²
Now find the final velocity:
v = at + v₀
v = (2 m/s²) (1 s) + 0 m/s
v = 2 m/s
Now find the final kinetic energy:
KE = 1/2 mv²
KE = 1/2 (10 kg) (2 m/s)²
KE = 20 J
