Physical Science Unit 2
Terms
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- What is acceleration?
- It is the rate of change of speed or velocity.
- What is direction?
- It is the course along which an object moves.
- What is displacement?
- It is the length of the shortest path from start to finish, coupled with direction.
- What is distance?
- It is the length of the total path taken.
- What is kinematics?
- It is the study and description of motion.
- What is magnitude?
- It is a property of an object's size.
- What is a qualitative description?
- It is a description done solely in words.
- What is a quantitative description?
- It is a description given in numbers.
- What is a reference point?
- It is the starting point for describing any motion.
- What is a scalar?
- A scalar is a quantity that has magnitude but no direction.
- What is SI?
- It it the International System of Units.
- What is speed?
- It is the rate of change of distance.
- What is a vector?
- It is a quantity that has both magnitude and direction.
- What is velocity?
- It is an object's displacement, divided by the time it takes to move that amount.
- What is air resistance?
- It is a form of friction between a moving solid object and air that causes the object to slow down.
- What is free fall?
- It is motion in which the only force acting is the force of gravity.
- What is gravity?
- It is the natural force of attraction Earth exerts on objects at or near its surface, which tends to draw them towards Earth's center.
- What is a vacuum?
- It is space in which all air has been removed.
- What is a projectile?
- It is an object that can be fired or launched into the air but cannot propel itself through the air.
- What is projectile motion?
- It is the motion of an object in which it moves both vertically and horizontally at the same time.
- What is a resultant displacement?
- It is the shortest path from start to finish.
- What is a resultant vector.
- It is the sum of two or more vectors.