Transcription of Physics Unit Study Guide (Answer Key)
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Name: _____ Period: _____ Date: _____ Physics unit Study Guide ( answer key ) Sections 1 3: Measuring Motion 1) What is a reference point (also called frame of reference)? An object that appears to stay in place 2) A change in position relative to a reference point is known as motion 3) Write the formula for speed. S = D/t 4) What is the average speed of a jet plane that flies 7200 km in 9 hours? 800 km/hr 5) How is velocity and speed the same? How are they different? Both measure the distance traveled over a period of time. Velocity adds a direction 6) The rate at which velocity changes over time is acceleration 7) Write the formula for acceleration (Final velocity initial velocity) / total time 8) Identify the term that describes a decrease in acceleration. deceleration Section 4: What is Force? 1) A force is a push or a pull. 2) True or False. A force can give energy to an object and cause it to start moving, stop moving, or change direction.
Sections 7 -9: Newton’s Laws and Momentum 1) Explain Newton’s First Law.An object at rest stays at rest, an object in motion stay in motion, unless acted upon by an outside force. 2) When you ride a bus, why do you fall forward when the bus stops moving?You are still an object in motion and not
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