3 years ago

A student tries to push a refrigerator-sized box of textbooks safely across the classroom.

Biology

2 answers:

Softa [21]3 years ago

8 0

Answer:

The forces acting on the box became unbalanced when the third student started pushing.

Explanation:

Julli [10]3 years ago

6 0

Answer:

The forces acting on the box became unbalanced when the third student started pushing.

Explanation:

The horizontal forces, friction and applied, were balanced until more force was applied than friction. Mass can't increase or decrease.

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