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Physics Reaction time and constant velocity
Terms in this set (23)
A quantity that has magnitude and direction
A quantity that has magnitude and size
a scalar quantity that refers to "how much ground an object has covered" during its motion.
A vector whose length is the initial distance minus the final distance (xi-xf)
A vector measurement of the rate and direction of motion
Distance travelled per unit time
Quantity whose value can change
V=d/t or velocity=distance / time
the velocity equals the distance divided by time
acceleration= delta velocity/time
change in position
what do we mean when we say that motion is relative?
Motion is relative to show distance
what is the difference between distance and displacement?
distance= how much an object covers
displacement= final position of point
what is the difference between speed and velocity
velocity= distance of direction and motion
speed= measurement of direction and motion
the average. velocity of an object is given by the following equation
what does constant velocity imply?
It implies that something will travel at a constant speed
What two controls on a car cause a change in speed? What control causes only a change in velocity?
accelerator and brake pedal
accelerator,brake pedal,steering wheel.
What is the average velocity of a cheetah that runs 88m in 5sec?
v=🔺x/t = 88m/5s= 17.6m/s
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