Basic physics concepts covered on the HESI A2 Physics module: motion, forces, energy, and simple machines.
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- What does Newton's first law of motion state?
- An object at rest stays at rest, and an object in motion stays in motion, unless acted on by an outside force.
- What does Newton's second law of motion state?
- Force equals mass times acceleration (F = ma).
- What does Newton's third law of motion state?
- For every action, there is an equal and opposite reaction.
- What is the SI unit of force?
- The newton (N)
- What is the definition of speed?
- The distance an object travels per unit of time.
- What is the definition of velocity?
- An object's speed in a given direction.
- What is the definition of acceleration?
- The rate at which an object's velocity changes over time.
- What is the SI unit of acceleration?
- Meters per second squared (m/s^2)
- What is the standard value of acceleration due to gravity on Earth?
- About 9.8 meters per second squared
- What is the definition of mass?
- The amount of matter in an object.
- What is the definition of weight?
- The force of gravity acting on an object's mass.
- What is the formula for weight?
- Weight = mass times gravitational acceleration (W = mg)
- What is the definition of momentum?
- The quantity of motion an object has, based on its mass and velocity.
- What is the formula for momentum?
- Momentum = mass times velocity (p = mv)
- What does the law of conservation of momentum state?
- The total momentum of a closed system remains constant if no outside forces act on it.