Question

which would require a greater force acclerating 2kg mass at 5m/s -2 or a 4kg mass at 2m/s-2 ?

Answer 1

2 kg mass & 5 m/s² accelkeration require more force
as force = msass*acceleration
f1 = 5*2 = 10N
f2 = 4*2 = 8N