UNITS
The standard unit of distance
meters, miles, kilometers
The rate at which an object covers distance.
Speed
The quantity we plot in x-axis
time
A car travels 120 kilometers in 3 hours. What is its speed?
40 km/hr
The sum of all forces acting on object
net force
The standard unit of time
second, minute, hour
the speed in combination with the direction of motion of an object
velocity
The quantity we plot in y axis
distance
A train moves north and covers 180 miles in 4 hours. What is its velocity?
45 mi/hr north
What is the net force if the forces are balanced
0
The standard unit of speed
m/s, km/hr, mi/hr
A fixed, stationary object or location used as a basis for describing the position or motion of another object.
Reference Point
The appearance of the line in dt graph when an object is not moving
horizontal
A bike moves at 10 meters per second. How long will it take to travel 200 meters?
20 seconds
What is the unit of force?
Newton(s)
The standard unit of velocity
m/s or km/hr + direction
This tendency to resist changes in a state of motion
Inertia
The slope of the line in dt graph when the object is moving on constant speed
straight diagonal
A student walks 4 kilometers in 1 hour and then runs 6 kilometers in 1 hour. What is the average speed?
5 km/hr
A book is resting on a table. The force of gravity pulls it down with 10 N, and the table pushes up with 10 N. The net force is __________
0 N
The standard unit of acceleration
m/s2
The rate at which velocity changes with time
acceleration
The slope of the line when the object is decelerating (slowing down)
curve downward
A car speeds up from 10 m/s to 30 m/s in 5 seconds. What is its average acceleration?
4 m/s²
A person pushes a box to the right with 500 N. Friction pushes left with 245 N.
255 N to the right