Physics County Assessment Review – 1st Quarter
1) A student is standing 10 m to the left of the lab table and 4 m to the right of the door. What is the
student’s position relative to the door? What is the student’s position relative to the lab table?
4 m relative to the door
- 10 m relative to the table
2) A bird is perched on a tree branch 35 m above the ground and 5 m below its nest. What is the bird’s
position relative to the ground? What is the bird’s position relative to its nest?
35 m relative to the ground
-5 m relative to the nest
3) A train is moving on a train track and passing a row of houses:
a. If the house looks like it’s standing still, your reference frame is (the house, the train).
b. If the house looks like it’s moving, your reference frame is (the house, the train).
4) When you are measuring how long it takes for a person running on the track to travel each 10 meter
mark, what would be your dependent and independent variables?
dependent variable = time
independent variable = distance
5) Convert 45 cm/s to m/s (show your work)
45 cm/s x 1 m/100 cm = 0.45 m/s
6) Convert 25 m/s to km/h (show your work)
25 m/s x 1 km/1000 m x 3600 s/1 h = 90. km/h
7) Convert 45 km/h to m/s (show your work)
45 km/h x 1000 m/1 km x 1 h/ 3600 s = 13 m/s
8) Jerry runs 45 m south turns around and runs 45 m north all in 8.5 s. What is the distance covered by
Jerry in this time? What is his displacement? What is his average speed? What is his average velocity?
Distance = 45 m + 45 m = 90. m
Displacement = 0 m
Speed = 90. m / 8.5 s = 11 m/s
Velocity = 0 m / 8.5 s = 0 m/s
9) A car goes from rest to 35 m/s in 3.25 s. What is the car’s acceleration?
a = (vf – vi) / t
a = (35 m/s – 0 m/s) / 3.25 s = 11 m/s2
10) A biker is traveling at 15 m/s and slows down as he approaches traffic. If he slowed down at a steady
rate of -2.0 m/s2 in 2.5 s, what would be his velocity after this time?
a = (vf – vi) / t
-2.0 m/s2 = (vf – 15 m/s) 2.5 s
vf = 10. m/s
11) Laura is looking for a treasure in the Enchanted Forest. She started from the magical Elm Tree and
walked 20 m north, 50 m east, 10 m north, 90 m west, and 30 m south. What is the total distance
covered by Laura? What is her displacement relative to the magical Elm Tree?
Distance = 200 m
Displacement = 40 m, west
12) Describe the velocity given the following distance-time graph. What does the slope of a distance-time
graph give you?
at rest/zero velocity
constant velocity
increasing velocity
decreasing velocity
the slope of a distance-time graph is equal to the velocity
13) Describe the velocity given the following velocity-time graph. What does the slope of a velocity-time
graph give you
increasing velocity(+), increasing velocity(-), decreasing velocity(+), decreasing velocity(-), constant velocity
the slope of a velocity-time graph is equal to the acceleration
14) Determine the area and perimeter of the two figures below:
Perimeter = 18.9 cm
Area = 20. cm2
Perimeter = 16 cm
Area = 20 cm2