AP Physics 2 Fluids Review

The venturi tubes shown above have three sections with different radii. Which of the following is true about the manometer readings?

• P1 = P2 = P3

• P3 > P1 > P2

• P2 > P1 > P3

• P1 > P2 > P3

A fisherman is in a boat in a small pond. He has a steel anchor on the boat. He drops the anchor in the pond, allowing it to sink. As a result, the water level in the pond will:

• rise

• lower

• stay the same

• ( ͡° ͜ʖ ͡°)

A 3.0 kg block hanging from a spring scale is submerged in a beaker of water until the spring scale reads 20 N. What is the buoyant force on the block?

• 10 N

• 17 N

• 37 N

• 50 N

Two metal cylinders of equal density and volume are submerged in water and remain at rest with their top surfaces at the same height, as shown. Cylinder A has a smaller height and a larger cross-sectional area than cylinder B. Assuming both blocks are more dense than water, which block would move downwards with a larger acceleration?

• Cylinder A

• Cylinder B

• The accelerations are equal

• (^_^)

Tags

NGSS.HS-PS2-1

Rank the tensions

• C > B > A

• A > B > C

• C > (A = B)

• A > C > B

Tags

NGSS.HS-PS2-1

A beaker partially filled with water rests on a scale. A metal block is lowered into the water by a string until it is fully submerged. Which of the following correctly explain why the reading on the scale increases? Select two answers.

• The higher water level causes a greater pressure on the bottom of the beaker.

• The block exerts a downward force on the water equal to the buoyant force on the block.

• The increase in density of the water at the bottom of the beaker causes the pressure on the bottom of the beaker to increase.

• The block exerts a downward force on the water equal to the weight of the block.

Tags

NGSS.MS-PS2-1

An ideal fluid is moving from left to right through a pipe, as shown in the figure above. The diameter of the pipe decreases and the height increases from left to right. True statements about the pressure of the fluid as it moves through the pipe include which of the following? Select two answers.

• The pressure tends to decrease due to the increase in the fluid’s speed as the pipe gets narrower.

• The pressure tends to decrease due to the increase in the potential energy of the fluid-Earth system as the pipe gets higher.

• The pressure tends to increase due to the decrease in the fluid’s speed as the pipe gets narrower.

• The pressure tends to increase due to the increase in the potential energy of the fluid-Earth system as the pipe gets higher.

The dashed line in the figure shows a stream of water from the end of a horizontal hose with an opening of diameter 2 cm. The water lands a horizontal distance D from the end of the hose. With the water pressure remaining the same, the diameter of the opening is decreased from 2cm to 1cm. At what horizontal distance from the end of the hose will the stream of water now land?

• D/4

• D/2

• 2D

• 4D