Question

Two bars, bar 1 and bar 2, are at rest on a smooth horizontal table as shown in the top view above. Each bar is connected to the table with a vertical pin. Bar 1 and bar 2 are made from the same material and have the same physical dimensions, but bar 1 has three additional large holes drilled through it. The two bars are each accelerated from rest by forces of equal magnitude F
applied at their right end. The forces remain perpendicular to the bars and the forces are exerted for an equal amount of time t1
.

(a) Briefly explain using physics principles why the angular displacement for bar 1 is larger than the angular displacement for bar 2.

Answer 1

Bar 1 has larger angular displacement than bar 2 because it has more revolutions per second due to its larger hole size.

Angular speed of the bars

Angular speed is the rate of change of angular displacement with time.

ω = θ/t

where;

• ω is angular speed
• θ is angular displacement
• t is time of motion

The bar with three additional large holes drilled through it (bar 1), will have more rotation per second because its holes are bigger than that of bar 2.

The bar with more rotations or angular speed will have more angular displacement.

Thus, bar 1 has larger angular displacement than bar 2 because it has more revolutions per second due to its larger hole size.

Learn more about angular displacement here: https://brainly.com/question/12972672

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