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Study guide for Unit 2 Test (ANS)


Study guide for Unit 2 Test (One-dimensional accelerated motion)

Unit outcomes:

1. Create and interpret x vs. t graphs for uniformly accelerated motion;

2. Create and interpret v vs. t graphs for uniformly accelerated motion;

3. Solve problems in one-dimensional motion involving position, velocity, time, and constant acceleration;

4. Solve a one-dimensional motion problem with two equations and two unknowns; and

5. Calculate speed and position for bodies in free fall

Review questions/problems:

1. An object, starting from rest, accelerates at 3 m/s


for 10 seconds. It then travels at a constant speed for

5 seconds before experiencing an acceleration of – 5 m/s


for 7 seconds. a) Draw of velocity vs time graph for the motion of the object, starting at 0 s. Make sure to mark the axes with the appropriate times and velocities. b) At the end of the motion described, it the object moving in its original direction, opposite the original direction, or is it at rest? Provide evidence from the graph in part (a) to support your answer.

2) Consider the position vs time graph below. On the graph, mark where the object experiences a positive acceleration, where it is traveling at a constant velocity, and where it experiences a negative acceleration.

3) A rocket car starts form rest and accelerated to a velocity of 50.0 m/s in 10 seconds. How far does the car travel in this time?

4) A rock is dropped off a cliff and hits the ground at 15.0 m/s. How high is the cliff?

5) A charged particle enters an electric field traveling at 4.00 x 10


m/s. It experiences an acceleration and ends out going 3.00 x 10


m/s in the opposite direction ending up 0.03 m behind where is started. What is the acceleration the particle experienced?

6) A football is thrown straight up at 10.0 m/s. What is its position, relative to the point of release, after

1.5 s?

7) For practice, work on and complete the following Concept Builder at the Physics Classroom site:

Acceleration: https://www.physicsclassroom.com/Concept-Builders/Kinematics/Acceleration

Name that Motion: https://www.physicsclassroom.com/Concept-Builders/Kinematics/Name-That-


Velocity-Time Graphs: https://www.physicsclassroom.com/Concept-Builders/Kinematics/Velocity-


Free-Fall: https://www.physicsclassroom.com/Concept-Builders/Kinematics/Free-Fall

Up and Down: https://www.physicsclassroom.com/Concept-Builders/Kinematics/Up-and-Down