This document provides a review of 1D motion concepts including: 1) Five displacement-time graphs are presented and questions ask which graph represents an object with constant positive velocity, constant negative acceleration, or increasing velocity. 2) Conversion problems are given between units like mm to km, m/s to km/hr. 3) Seven multi-part word problems involve concepts like constant velocity, uniform acceleration, determining time, distance, velocity, and acceleration in situations like cars accelerating and braking. Diagrams, equations, and step-by-step working are not shown.

1. 1D Motion Review
Motion Graphs
Use the displacement-time graphs below to answer questions 1-5 not all graphs may be
used while some may be used more than once. These questions are worth 1 point each.
a
b c d e
_____1. Which graph shows an object traveling with a constant positive velocity?
_____2. Which graph shows an object traveling with constant negative acceleration?
_____3. Which graph shows an object traveling with an increasing velocity?
_____4. Which graph shows an object traveling towards the reference point with no
acceleration?
_____5. Which graph shows an object at rest?
Convert the following measurements into the indicated units.
1) 530 mm to km. __________________________
2) 2 pg to cg ________________________
3) 7.1 x 1012 m to km ______________________
3
4) 6.5 x 10 pm to km ______________________
5) 50 m/s to km/hr _______________________
6) 36 km/hr to m/s ______________________
1D Motion Problems
Equations:
a = vf – vI df = vit + ½ at2 df = ½ (vf + vi)t
t
v=d vf2 = vi2 + 2ad
t
1) A car traveling at a constant speed of 30 m/s (~ 67 mi/h) passes a trooper hidden
behind a billboard. One second after the speeding car passes the billboard, the trooper
sets off in chase with a constant acceleration of 3.00 m/ss. How long does it take for
the trooper to overtake the speeding car?
2) A tennis ball with a speed of 10.0 m/s is thrown perpendicularly at a wall. After
striking the wall, the ball rebounds in the opposite direction with a speed of 8.0 m/s.
If the ball is contact with the wall for 0.012 s, what is the average acceleration of the
ball while it is in contact with the wall?

2. 3) A racing car reaches a speed of 40 m/s. At this instant it begins a uniform negative
acceleration, using a parachute and a braking system, and comes to rest 5.0 s later. a)
Determine the acceleration of the car. b) How far does the car travel after the
acceleration starts?
4) A jet airplane lands with a velocity of +100 m/s and can accelerate with a maximum
rate of –5.0m/s2 as it comes to rest. a) From the instant it touches the runway, what
is the minimum time needed before it can come to rest? b) Can this plane land on a
small island airport where the runway is 0.80 km long?
5) A truck on a straight road starts from rest accelerating at 2.0 m/s2 until it reaches a
speed of 20 m/s. Then the truck travels for 20 s at constant speed until the brakes are
applied, stopping the truck in a uniform manner in an additional 5.0 s. a) How long is
the truck in motion? b) What is the average velocity of the truck for the motion
described?
6) A small mailbag is released from a helicopter that is descending steadily at 1.50 m/s.
After 2.00 seconds a) what is the velocity of the mailbag, and b) how far is it below
the helicopter? c) What are your answers to part a & b if the helicopter is rising
steadily at 1.50 m/s?
7) A car starts from rest and travels for 5.0 s with uniform acceleration of +1.5 m/s2. The
driver then applies the brakes causing a uniform acceleration of –2.0 m/s2. If the
brakes are applied for 3.0 s, how fast is the car going at the end of the braking period,
and how far has it gone?