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HESI A2 physics practice questions, set 8

HESI A2 · physics

HESI A2 physics practice questions set 8

You practice the motion, energy, and wave items some schools still score on HESI A2. Five of the 15 questions include the correct answer and rationale. The other ten keep answers in the study hub. Continue with the HESI A2 exam guide or more HESI A2 practice questions.

Five physics questions with answers

Cover the key. Write the first action. Then open the rationale and name why the other choices fail.

Question 1

Two objects attract each other with a gravitational force of 12 units. If you double the distance between the objects, what is the new force of attraction between the two?

  1. A. 3 units
  2. B. 6 units
  3. C. 24 units
  4. D. 48 units
Show answer and rationale

Correct answer: A — 3 units

The gravitational force between two objects is inversely proportional to the square of the distance between them. If the distance is doubled, the force will be reduced to 1/4 of the original force. Therefore, the new force of attraction between the two objects will be 12 units / 4 = 3 units. Choice A is correct because doubling the distance reduces the force to 1/4 of the original value. Choices B, C, and D are incorrect as they do not consider the inverse square relationship between distance and gravitational force.

Question 2

In a static fluid, pressure (P) at a depth (h) is governed by the hydrostatic equation:

  1. A. P = ρgh
  2. B. P = γh
  3. C. P = μgh
  4. D. P = bh
Show answer and rationale

Correct answer: A — P = ρgh

The correct formula for the pressure at a certain depth in a fluid according to the hydrostatic equation is P = ρgh. Here, ρ represents the fluid's density, g is the gravitational acceleration, and h is the depth. This formula shows that pressure increases linearly with the density of the fluid, the acceleration due to gravity, and the depth. Choices B, C, and D are incorrect because they do not accurately represent the relationship between pressure, density, gravitational acceleration, and depth in a static fluid.

Question 3

A circular running track has a circumference of 2,500 meters. What is the radius of the track?

  1. A. 1,000 m
  2. B. 400 m
  3. C. 25 m
  4. D. 12 m
Show answer and rationale

Correct answer: B — 400 m

The radius of a circular track can be calculated using the formula: Circumference = 2 ? radius. Given that the circumference of the track is 2,500 m, we can plug this into the formula and solve for the radius: 2,500 = 2 ? radius. Dividing both sides by 2? gives: radius = 2,500 / (2 3.1416) ≈ 397.89 m. Therefore, the closest answer is 400 m, making option B the correct choice. Option A (1,000 m) is too large, option C (25 m) is too small, and option D (12 m) is significantly smaller than the calculated radius.

Question 4

In a U-tube manometer, a fluid is used to measure pressure differences. When one side is connected to a pressurized system, the fluid level on that side will:

  1. A. Remain the same
  2. B. Decrease
  3. C. Increase
  4. D. Depend on the type of fluid used
Show answer and rationale

Correct answer: B — Decrease

In a U-tube manometer, the side connected to a pressurized system will experience a decrease in fluid level due to the pressure exerted by the system. This pressure forces the fluid down, causing the fluid level to decrease. Therefore, choice B is correct. Choices A and C are incorrect because the fluid level will not remain the same or increase when connected to a pressurized system. Choice D is incorrect as the type of fluid used does not determine the direction of the fluid movement in response to pressure.

Question 5

When a small object floats on the surface of a liquid, the surface tension creates a:

  1. A. Buoyant force acting upwards
  2. B. Pressure difference causing sinking
  3. C. Drag force opposing motion
  4. D. Restoring force towards equilibrium
Show answer and rationale

Correct answer: D — Restoring force towards equilibrium

Surface tension creates a restoring force that holds the object on the surface. The liquid's surface behaves like a stretched membrane, and when disturbed, it tends to return the object to its original position, creating a restoring force. The other choices are incorrect: A buoyant force acts on objects submerged in a fluid, not floating on the surface; pressure differences usually affect sinking objects, not floating ones; drag force is a resistance force that opposes motion, not related to surface tension.

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Question 6

Ocean waves build during a storm until there is a vertical distance from the high point to the low point of 6 meters and a horizontal distance of 9 meters between adjacent crests. The waves hit the shore every 5 seconds. What is the speed of the waves?

  1. A. 1.2 m/s
  2. B. 1.8 m/s
  3. C. 2.0 m/s
  4. D. 2.4 m/s
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Question 7

The Reynolds number (Re) is a dimensionless quantity used to characterize:

  1. A. Fluid density
  2. B. Flow regime (laminar vs. turbulent)
  3. C. Surface tension effects
  4. D. Buoyancy force magnitude
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Question 8

During adiabatic compression of a gas, what happens to its temperature?

  1. A. Remains constant
  2. B. Decreases
  3. C. Increases
  4. D. Becomes unpredictable without additional information
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Question 9

What is the SI unit for quantifying the transfer of energy due to an applied force?

  1. A. Newton (N)
  2. B. Meter per second (m/s)
  3. C. Joule (J)
  4. D. Kilogram (kg)
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Question 10

An object with a mass of 45 kg has momentum equal to 180 kgâ‹…m/s. What is the object's velocity?

  1. A. 4 m/s
  2. B. 8.1 km/s
  3. C. 17.4 km/h
  4. D. 135 m/s
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Question 11

In Einstein's mass-energy equation, what is represented by c?

  1. A. Distance in centimeters
  2. B. The speed of light
  3. C. Degrees Celsius
  4. D. Centrifugal force
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Question 12

As a vehicle positioned at the peak of a hill rolls downhill, its potential energy transforms into:

  1. A. Thermal energy
  2. B. Neither thermal nor kinetic energy
  3. C. A combination of thermal and kinetic energy
  4. D. Kinetic energy
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Question 13

A 1,000-kg car drives at 10 m/s around a circle with a radius of 50 m. What is the centripetal acceleration of the car?

  1. A. 2 m/s²
  2. B. 4 m/s²
  3. C. 5 m/s²
  4. D. 10 m/s²
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Question 14

The frequency of an alternating current (AC) refers to the number of times it changes direction per unit time. This is measured in:

  1. A. Hertz
  2. B. Amperes
  3. C. Volts
  4. D. Ohms
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Question 15

The drag force (F_d) experienced by an object moving through a fluid depends on:

  1. A. Object's shape and size only
  2. B. Fluid properties and object velocity
  3. C. Depth of submersion only
  4. D. Buoyant force acting on the object
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About these HESI A2 physics questions

HESI A2 physics practice questions, set 8 for nursing students in the United States. Fifteen items. Five include answers and rationales in American English.

No. Nursier is independent practice. Register through the official path named on the HESI A2 exam guide.

The first five questions already include the rationale. Start full practice to unlock the remaining keys, missed-question review, and the rest of the bank.

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