Motion Test Practice

  1. Which of the following does not represent a velocity?
  1. 55 mphc.10 m/s down
  2. 210 km/hr Eastd.-2 cm/min
  1. Which of the following does not represent an acceleration?
  2. 9.8 m/s2c.4 mph/s
  3. 4 cm/s/sd.16 s2
  4. Describe the velocity of a basketball dropped on the ground, bouncing up, and then landing on the ground again.
  5. It is increasing velocity on the way down, increasing on the way up, and increasing on the way down again
  6. It is increasing velocity on the way down, decreasing on the way up, and increasing on the way down again
  7. It is decreasing velocity on the way down, increasing on the way up, and decreasing on the way down again
  8. It is decreasing velocity on the way down, decreasing on the way up, and decreasing on the way down again

Use the graph to answer the following questions

  1. How many times did the student stop?
  2. 0c.1
  3. 2d.3
  1. What happened at about 45 seconds?
  2. The speed stayed constantc.The speed increased
  3. The speed decreasedd.Not enough information
  1. How does the student’s traveling at 30 seconds compare with it at 60 seconds?
  2. At 30 seconds he was going forward and 60 seconds he was going backwards
  3. At 30 seconds he was going forward faster than forward at 60 seconds
  4. At 30 seconds he was going forward slower than forward at 60 seconds
  5. Not enough information
  1. What type of line on a time/distance graph shows positive acceleration?
  2. Curvedc.flat
  3. Sloped upd. sloped down
  1. What type of line on a time/velocity graph shows positive acceleration?
  2. Curvedc.flat
  3. Sloped upd. sloped down

Short answer

  1. When would a feather and a hammer fall and hit the ground at the same time? (assuming they are both dropped at the same time) Why would they hit at the same time?
  1. Matchbox wants to develop a new car line based on recent movies for Christmas. Explain the steps they would follow, with details, if they used the problem solving model to develop the new car line.
  1. Explain the travel of the following graph – assuming the driver starts south of the Dark Skies park

Draw a time/velocity graph depicting velocity for the previous graph

What is the acceleration if a falling object falls for 30 seconds?

What is the velocity if the object is falling at 25 m/s and falls for another 30 seconds?

What is the distance a bicycler travels if they bike at 35 km/hr for 2.1 hrs?

What is the acceleration of a skateboarder that goes from 6 m/s to 1 m/s in 2 seconds?

What is the average velocity of a bicycler who rides for 20 km in 30 minutes, stops for 5 minutes, then rides 40 km in 25 minutes?

Motion Test Practice KEY

  1. Which of the following does not represent a velocity?
  2. 55 mphc.10 m/s down
  3. 210 km/hr Eastd.-2 cm/min
  1. Which of the following does not represent an acceleration?
  2. 9.8 m/s2c.4 mph/s
  3. 4 cm/s/sd.16 s2
  4. Describe the velocity of a basketball dropped on the ground, bouncing up, and then landing on the ground again.
  5. It is increasing velocity on the way down, increasing on the way up, and increasing on the way down again
  6. It is increasing velocity on the way down, decreasing on the way up, and increasing on the way down again
  7. It is decreasing velocity on the way down, increasing on the way up, and decreasing on the way down again
  8. It is decreasing velocity on the way down, decreasing on the way up, and decreasing on the way down again

Use the graph to answer the following questions

  1. How many times did the student stop?
  2. 0c.1
  3. 2d.3
  1. What happened at about 45 seconds?
  2. The speed stayed constantc.The speed increased
  3. The speed decreasedd.Not enough information
  1. How does the student’s traveling at 30 seconds compare with it at 60 seconds?
  2. At 30 seconds he was going forward and 60 seconds he was going backwards
  3. At 30 seconds he was going forward faster than forward at 60 seconds
  4. At 30 seconds he was going forward slower than forward at 60 seconds
  5. Not enough information
  1. What type of line on a time/distance graph shows positive acceleration?
  2. Curvedc.flat
  3. Sloped upd. sloped down
  1. What type of line on a time/velocity graph shows positive acceleration?
  2. Curvedc.flat
  3. Sloped upd. sloped down

Short answer

  1. When would a feather and a hammer fall and hit the ground at the same time? (assuming they are both dropped at the same time) Why would they hit at the same time?

If there is no wind resistance, both items fall at the same rate – so on the moon, in a vacuum, any place there is no air.

Air causes wind resistance which pushes against the pull of gravity. This decreases the net force and the final acceleration.

  1. Matchbox wants to develop a new car line based on recent movies for Christmas. Explain the steps they would follow, with details, if they used the problem solving model to develop the new car line.
  1. Define problem – make cars from those in movies, research what cars have already been done, decide what size cars to make
  2. Plan – decide on the specific cars, sizes, materials, prices, etc. Choose a test group (at a mall, movie theater showing the movie the cars are from, etc.) to see cars and say if they would buy/play with the cars.
  3. Do it – make cars, show to kids/parents to see if people like them
  4. Evaluate – see if cars last or fall apart, does paint stay okay, do people like them or do we need a new design?
  1. Explain the travel of the following graph – assuming the driver starts south of the Dark Skies park
  1. Drove north for 20 minutes traveling 10 miles
  2. Stopped for 5 minutes
  3. Drove north for 25 minutes traveling 25 miles
  4. Stopped for 10 minutes
  5. Drove south for 35 minutes traveling 35 miles

Draw a time/velocity graph depicting velocity for the previous graph

What is the acceleration if a falling object falls for 30 seconds?

9.8 m/s2

What is the velocity if the object is falling at 25 m/s and falls for another 30 seconds?

A=9.8 m/s2A*T = Vf-Vo(9.8m/s2)(30s)=Vf-25 m/s

Vo = 25 m/s294 m/s – Vf – 25 m/s

T = 30 sVf = 319 m/s

Vf= ?

What is the distance a bicycler travels if they bike at 35 km/hr for 2.1 hrs?

V=35 km/hV=D/T35 km/hr = D/2.1 hr

T= 2.1hr(35 km/hr)*(2.1 hr) = D

D = ?D = 73.5 km

What is the acceleration of a skateboarder that goes from 6 m/s to 1 m/s in 2 seconds?

Vo = 6 m/sA*T = Vf-VoA*(2 sec) = 1 m/s – 6 m/s

Vf = 1 m/sA*2 sec = -5m/s

T = 2 secA = -2.5 m/s

A = ?

What is the average velocity of a bicycler who rides for 20 km in 30 minutes, stops for 5 minutes, then rides 40 km in 25 minutes?

Total Distance = 60 kmV=D/TV=60 km/60 min

Total Time = 60 minV=1 km/min

Ave Vel= ?