IB Physics Flashcards
7 cards from real IB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 IB Physics flashcards as text
What is the SI unit of force in IB Physics?
Answer: Newton
The Newton (N) is the SI unit of force, defined as the force that gives a 1 kg mass an acceleration of 1 m/s².
Which equation correctly represents Newton's Second Law of Motion?
Answer: F = ma
Newton's Second Law states that the net force on an object equals its mass multiplied by its acceleration (F = ma).
A ball is thrown horizontally from a cliff. Which quantity remains constant throughout its flight, ignoring air resistance?
Answer: Horizontal velocity
With no air resistance, no horizontal force acts on the ball, so the horizontal velocity component remains constant throughout the flight.
What value of gravitational field strength (g) is given in the IB Physics data booklet?
Answer: 9.81 m/s²
The IB Physics data booklet specifies g = 9.81 m/s² as the standard acceleration due to gravity at Earth's surface.
Which of the following is a vector quantity?
Answer: Displacement
Displacement is a vector quantity because it has both magnitude and direction, unlike speed, mass, and temperature which are scalars.
At the highest point of a projectile's trajectory, what is true about the velocity?
Answer: Only vertical component is zero
At the highest point, the vertical component of velocity is zero because the projectile momentarily stops moving upward, but the horizontal component remains unchanged.
What does the area under a velocity–time graph represent?
Answer: Displacement
The area under a velocity–time graph equals displacement because displacement is the integral of velocity with respect to time.
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