A Box Is Moved 10 M Across a Smooth Floor

question 44

Multiple Choice

A box is moved 10 m across a smooth floor by a force F making a downward angle with the floor, so that there is effectively a 4 N force acting parallel to the floor in the direction of motion and a 3 N force acting perpendicular to the floor. The force F acts for 20 seconds. The impulse delivered to the box by the floor during this process has magnitude

• A) 100 Ns.
• B) 80 Ns.
• C) 60 Ns.
• D) zero.
• E) Can't tell without knowing the weight of the box.

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Left out or not included, either purposefully or accidentally.

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