Reaction Time & Measurement Vocab
This factor can increase your reaction time if you are not focused.
Distractions
A straight line with a positive slope on a distance-time graph represents this.
Constant Speed
There are three ways to accelerate: Speed up, slow down and ...
Change Direction
This law states that an object remains at rest or in motion unless acted on by a force.
Newton's First Law
The amount of matter in an object is its ...
Mass
The time it takes for a person to respond to an event.
Reaction Time
The total length of the path an object travels, regardless of direction.
Distance
An object goes from 0 m/s to 20 m/s in 5 seconds. Find its acceleration.
4m/s2
This term describes an object’s resistance to changes in motion.
Inertia
The force of gravity acting on an object is its ...
Weight
The difference between a measured value and the true value.
Error
If a runner covers 100 meters in 10 seconds, their speed is:
10 m/s
A car starts from rest and accelerates at 2 m/s² for 5 seconds. Final velocity?
10 m/s
The equation that represents Newton’s Second Law.
F = ma
Calculate a 25-kg object’s weight on Earth (g = 10 m/s²).
250 N
An approximate calculation rather than an exact measurement.
Estimate
This quantity describes speed and direction.
Velocity
True or false: In a strobe photo, objects farther apart mean the object is moving slower.
False
If a 10-kg object experiences a force of 50 N, this is its acceleration.
5 m/s2
If a book weighs 14 N on a table,the normal force acting on the book is:
14 N
How close a measurement is to the true or accepted value.
Accuracy
A car travels at 120 mph for 3 hours. How far does it travel?
360 miles
A car is moving in a perfect circle at a constant speed. Is the car accelerating?
Yes, because the direction is changing.
For every action, there is ...
an equal and opposite reaction
What is a free body diagram?
A diagram that shows all forces acting on an object.