Physics Labs (Bubble Tubes, Rolling objects, HoverCrafts)

Based on the Bubble Tube Lab that we completed, what is the role of VISCOSITY and the speed in which the bubble moved up the tube?

• Viscosity is the resistance to flow so the greater the viscosity, the faster the bubble traveled up the tube

• Viscosity is the resistance to flow so the greater the viscosity, the slower the bubble traveled up the tube

• Viscosity means that all fluids have the same fluidity; so all bubbles travel up the tube at the same rate

SOLVE using the graph: Based on the graph, which color had a velocity of ABOUT 5cm/sec, upward?

velocity = displacement / time

• Red

• Blue

• Green

• All traveled at that velocity

What direction does the force of 'buoyancy' act?

• Downward

• Sideways (left or right)

• Upward

• There is no way to answer this

How could we get the bubble in the GREEN tube to move faster than the bubble in the RED tube?

• Heat up both tubes

• Cool down both tubes

• Cool down the red tube and heat up the green tube

• Heat up the red tube and cool down the green tube

Rolling Objects: We rolled a ping pong ball, a golf ball, and a bowling ball on the floor. Which object had/has the greatest amount of inertia?

• Ping pong ball

• Golf ball

• Bowling ball

• All traveled the same distance

Rolling Objects: Which object (ping pong ball, a golf ball, or bowling ball) will be most easily affected (slowed down) by friction when rolling?

• Ping pong ball

• Golf ball

• Bowling ball

• All have the same inertia

When the hovercraft is turned OFF and at rest, which of the following describes its state of motion?

• Accelerating

• Dynamic equilibrium

• Static equilibrium

• Unbalanced forces

Which of the following Free-Body Diagram (FBD) shows forces acting on a hovercraft that is turned off and at rest?

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Which of the following Free-Body Diagram (FBD) shows forces acting on a hovercraft that is turned off while you are pushing on it, accelerating it?

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Which of the following Free-Body Diagram (FBD) shows forces acting on a hovercraft that is turned off AFTER you pushed it but are no longer pushing on it and it is moving to the right?

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