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Speed Velocity Momentum AccelerationForce and Motion MatchCardDOWNLOAD BELOW.
Speed Velocity Momentum Acceleration MatchCardObjective: Define speed, velocity, momentum, and acceleration.Provides the definition, formula, examples and demonstration activities for speed, velocity, momentum, and acceleration. SpeedThis is the easiest for students to grasp. Ask them what they think speed is?Definition: Speed is the amount of distance in a given time. Use a toy car to visualize the concept of speed. If you went 25 miles in one hour, what is your speed? What if you went 150 miles in 2 hours? In physics, speed is often measured in meters per second. When we travel, we often use miles per hour. Formula: Rate equals distance divided by time Rate = Distance/Time Examples of speed:
VelocityAsk what velocity is. How does it compare to speed?Use your toy car to visualize this example.
That is a velocity of 16 mph. Not much progress for someone going 50 mph, is it? Velocity is often used with airplane travel. In addition to changing directions, air planes also travel up and down. The velocity, however, is speed in a given direction from the beginning to the end of the trip. Velocity is written as speed in a given direction, and usually the direction is stated. Examples:
MomentumAsk: What would do more damage? A large truck going 25 mph that hits a building, or a small car?Why? Momentum is the scientific concept that multiples mass with speed. Momentum is defined as the power of a moving object to keep moving. In this example the heavier truck had more power to keep moving, so it caused more damage. Mass X Velocity In our common language we often talk about "momentum" and "the snow ball effect." This might be a good time to review what the snow ball effect is. The snow ball picks up mass (gets larger) and velocity (speed going downhill) with time. Therefore, it gains momentum.Popular ideas and trends often are said to "gain momentum" even if there is no scientific object. Can you discuss examples? AccelerationAsk what acceleration is. Can you give common examples?The definition of acceleration is the change in speed over time. Using your toy car, demonstrate this example:
Discuss the feeling of acceleration when a car is merging onto a highway. You can also refer to acceleration on a bike or jet. Scientists usually measure acceleration in meters per second per second. In the example above, the original time listed was 15 mph. That would actually be 1600 meters (one mile) in 3600 seconds (one hour) per second. That would be .444 meters per second per second. Or, every second the car went .444 meters faster than the second before. The formula is change in speed divided by time. Change in Speed/Time elapsed Deceleration is the negative change in speed over time. Compare the sensations of accelerating and decelerating.Brainstorm a list of things that accelerate. Add to the list over the weeks of your Force and Motion Unit Study. Download the Speed Velocity Momentum Acceleration MatchCardThis is the sixth Matchcard of the Force and Motion Unit Study. You can DOWNLOAD theSpeed Velocity Momentum Acceleration Matchcard HERE. The student places the definitions, formulas, and examples in the correct boxes. The second page is the Instructor's Guide with the correct answers. The third page has the Information Pieces. Student's cut them apart and place them in the correct place on their copy of the Matchcard (first page.) For more information on how to use the Matchcards, see the MatchCard Science Instructor's Guide. More information on this interactive unit study is below. MatchCard ScienceThe activities and illustration above are from MatchCard Science, a homeschool science unit study. For the complete Force and Motion Unit Study follow this link. This unit study provides:
Return from Speed Velocity Momentum Acceleration to the MatchCard Science Main Page. |
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