A Tractor T Is Pulling Two Trailers, M₁ and M₂

question 111

Multiple Choice

A tractor T is pulling two trailers, M₁ and M₂, with a constant acceleration. T has a mass of 200 kg, M₁ has a mass of 100 kg, and M₂ has a mass of 150 kg. If the forward acceleration is 0.60 m/s², then the horizontal force on the tractor due to the ground is (ignore air resistance)

• A) 270 N backward.
• B) 270 N forward.
• C) 150 N backward.
• D) 150 N forward.
• E) 90 N forward.

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Definitions:

Longitudinal Study

An observational research method in which data is gathered for the same subjects repeatedly over a period of time.

Developmental Trends

Patterns and sequences of development observed over time, which can include physical, cognitive, and social changes.

Causality

The relationship between cause and effect, where one event (the cause) is understood to lead to another event (the effect) as a result.

Longitudinal Studies

Research designed to observe the same subjects over a period of time, allowing for the study of changes and developments.