Final answer:
Without the acceleration value for the pineapple, we cannot calculate the force using Newton's second law; however, an example calculation was demonstrated using given vales of acceleration (4g) and mass (70kg).
Step-by-step explanation:
To calculate the force required to move a 2kg pineapple at a rate of 4m/s, we need to clarify the question. The rate mentioned seems to imply velocity, but force depends on acceleration, not velocity. If we want to use Newton's laws of motion, specifically the second law (F=ma), we need information about the pineapple's acceleration. However, since acceleration details are not provided, we will assume that the pineapple starts from rest and reaches 4m/s in a given timeframe.
For the provided example, the given acceleration (a) is 4g, or 4 times Earth's gravitational acceleration, which is 39.2 m/s² (since g ≈ 9.80 m/s²). For a mass (m) of 70.0 kg like in the given example, the force (F) can be calculated as:
F = m * a
F = 70.0 kg * 39.2 m/s²
F = 2744 N
This calculation shows the force needed to accelerate a mass of 70.0 kg at 4g.
However, for the pineapple, we cannot calculate the force without knowing the acceleration.