The force acting on a single cargo runner...

Question 1 / 2707066636ee728f7522a1c517c3c

Question 1 of 2707066636ee728f7522a1c517c3c

The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when __________.

Question 1 of 27070

The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when __________.

🔍 Key Concepts

• Inertia and acceleration of the load when starting or stopping motion • Difference between tension at constant speed vs tension when speeding up or slowing down • Effect of direction of acceleration relative to gravity (up vs down)

💭 Think About

• When the load is moving at a constant speed, how does the tension in the cargo runner compare to the weight of the load? • When you speed up or slow down a load, how does the extra force from acceleration add to or subtract from the load’s weight in the rope? • Think about both raising and lowering: in which combination of direction (up or down) and acceleration (speeding up or slowing down) would the rope need to support more than just the weight of the load?

✅ Before You Answer

• Be clear whether the load is accelerating or at constant speed – tension changes with acceleration, not with speed alone • Check the sign of acceleration: is it acting with gravity or against gravity? This changes whether the rope force is more or less than the weight • Verify which situation makes the effective load in the rope (weight ± mass × acceleration) the largest overall

Question 1 of 27070

The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when __________.

decelerating when raising the load

decelerating when lowering the load

lowering the load at constant speed

raising the load at constant speed

Question 1 / 2707066636ee728f7522a1c517c3c

Question 1 of 2707066636ee728f7522a1c517c3c

The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when __________.

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Question 1 of 27070

The force acting on a single cargo runner which is vertically lifting or lowering a load is greatest when __________.