Final answer:
The magnitude of the change in momentum of a 12 kg mass experiencing an 18 N opposing force for 3.0 s is 54 kg·m/s, calculated using the impulse which is the product of force and time.
Step-by-step explanation:
The student has asked about the magnitude of the change in momentum of a 12 kg mass which experiences an opposing force for a certain duration. To find this, we use the concept of impulse, which is the product of force and time. The impulse, in turn, equals the change in momentum of the object.
The formula to calculate the change in momentum (Δp) is:
Δp = F × t
Where:
F is the force applied (18 N)
t is the time for which the force is applied (3.0 s)
Substituting the values:
Δp = 18 N × 3.0 s = 54 kg·m/s
Therefore, the magnitude of the change in momentum of the object is 54 kg·m/s.