Question

If an object has Pi (initial momentum) of 20 kgm/s ends with a Pf (final momentum)
of 40 kgm/s. How long would a 5N force need to act on it? *

Answer 1

Answer:

200

Explanation:

If an object has Pi (initial momentum) of 20 kgm/s ends with a Pf (final momentum)

of 40 kgm/s. How long would a 5N force need to act on it? *

Answer 2

The time of action of the applied force to cause the change in the momentum of the object is determined as 4 s.

Change in momentum of the object

The change in the momentum of the object is as a result of the impulse received by the object.

ΔP = Ft

where;

• ΔP  is change in momentum
• F is applied force
• t is time of motion

t = ΔP/F

t = (Pf - Pi) / F

t = (40 - 20)/5

t = (20)/5

t = 4 s

Thus, the time of action of the applied force to cause the change in the momentum of the object is determined as 4 s.

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