HESI A2
HESI A2 Physics Practice Test Questions
Question 1 of 5
If a 5-kg ball is moving at 5 m/s, what is its momentum?
Correct Answer: D
Rationale: The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the ball is 5 kg and its velocity is 5 m/s.
Therefore, the momentum of the ball is 5 kg 5 m/s = 25 kgâ‹…m/s.
Choice A (10 kgâ‹…m/s) is incorrect as it does not account for both mass and velocity.
Choice B (16.2 km/h) is incorrect as it provides a speed in a different unit without considering mass.
Choice C (24.75 kgâ‹…m/s) is incorrect as it does not correctly calculate the momentum based on the given mass and velocity.
Question 2 of 5
What is the SI unit for quantifying the transfer of energy due to an applied force?
Correct Answer: C
Rationale: The correct answer is C: Joule (J). The joule is the SI unit used to quantify the transfer of energy due to an applied force. It is defined as the work done when a force of one newton is applied over a distance of one meter. Newton (N) is the unit of force, not energy transfer. Meter per second (m/s) is the unit of speed, not energy transfer. Kilogram (kg) is the unit of mass, not energy transfer.
Therefore, the correct unit for quantifying the transfer of energy due to an applied force is the joule (J).
Question 3 of 5
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?
Correct Answer: B
Rationale:
To find the speed of the waves, we use the formula: speed = wavelength / period. The wavelength is the horizontal distance between adjacent crests, which is 9 meters in this case. The period is the time it takes for one wave to pass a fixed point, given as 5 seconds.
Therefore, speed = 9 meters / 5 seconds = 1.8 m/s.
Choice A (1.2 m/s) is incorrect because it miscalculates the speed.
Choice C (2.0 m/s) and
Choice D (2.4 m/s) are incorrect as they do not correctly calculate the speed using the provided data.
Question 4 of 5
In a scenario where a transverse wave transports energy from north to south, in what direction do the particles in the medium move?
Correct Answer: B
Rationale: In a transverse wave, particles of the medium move perpendicular to the direction of energy transport. When the wave transports energy from north to south, the particles in the medium oscillate up and down, causing them to move both northward and southward.
Choice A is incorrect because the particles move in both directions, not only from north to south.
Choices C and D are incorrect as they mention directions that are not relevant to the scenario described in the question.
Question 5 of 5
Marilyn is driving to a wedding. She drives 4 miles south before realizing that she left the gift at home. She makes a U-turn, returns home to pick up the gift, and sets out again driving south. This time, she drives 1 mile out of her way to pick up a friend. From there, they continue 5 miles more to the wedding. Which of these statements is true about Marilyn's trip?
Correct Answer: C
Rationale: Marilyn's displacement is calculated based on her final position relative to the starting point. She drives 1 mile to pick up her friend, then 5 miles more to the wedding, totaling 6 miles after returning to her home. So, the correct displacement is 8 miles south from her starting point (4 miles to the gift + 4 miles return + 1 mile to the friend + 5 miles to the wedding). The total distance traveled is 14 miles (adding all the distances).
Choice A is incorrect because it miscalculates the displacement.
Choice B is incorrect as it overestimates both the displacement and distance traveled.
Choice D is incorrect as it underestimates the displacement.