Question

(b) Which would require a greater force accelerating a 5 kg mass at 5 ms?
or a 3 kg mass at 7 ms??​

Answer 1

Force = mass * acceleration

Case I:

Mass = 5kg and Acceleration = 5ms

=> Force = 5*5 = 25 N

Case II:

Mass = 3kg and Acceleration = 7ms

=> Force = 7*3 = 21 N

Thus, the first case would require greater force.