Explanation:
Note that from Newton's law of motion:
the sum of the positive horizontal forces on an object equals the sum of the negative horizontal forces therefore, the net force on the object is zero.
Also, velocity is constant, acceleration is zero.
F = m × a
= 0 N
Here, we are required to determine what net force is required to keep the object moving on a straight line at constant speed.
The net force required is, F = 0.
According, to Newtons Second law of motion, which states that rate of change of momentum of a body over time is directly proportional to the force applied.
In this case scenario, to keep the object moving in a straight line at constant speed, the net force required is given by;
F = m(v - u)/t. = m × a
However, since at constant speed, acceleration,
a = 0.
Therefore, the net force required, F = m × a
F = m × 0.
Therefore, the net force required is, F = 0.
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