Chapter 3: Linear Motion Flashcards
Is credited with being the first to measure speed by considering the distance covered and the time it takes.
Galileo
The distance covered per unit of time.
Speed
The equation for speed.
Speed = Distance / Time
The speed at any instant.
Instantaneous Speed
The equation for average speed.
Average Speed = total distance covered ÷ time interval
If you’re ticketed for speeding which does the police officer write on your ticket your instantaneous speed or your average speed?
instantaneous speed
What is the equation for total distance covered?
Total distance covered = average speed x time interval.
What is the average speed of a cheetah that sprints 100 meters in four seconds?
Average speed = full distance covered ÷ by time interval.
25 m/s
What is the average speed of a cheetah that sprints 50 meters in two seconds?
Average speed = total distance covered ÷ time interval.
The speed of an object and its direction of motion; a vector quantity.
Velocity
A quantity in physics that has both magnitude and direction; examples are force, velocity, acceleration, torque, and electric and magnetic fields.
Vector quantity
Name six vector quantities.
Force, velocity, acceleration, torque, electric fields, and magnetic fields.
A quantity in physics such as mass, volume, time, and speed, that can be completely specified by its magnitude and has no direction.
scalar quantity
Steady speed
constant speed
Motion in a straight line at a constant speed. Means both constant speed and constant direction.
Constant Velocity
