PHYSICS: UNIT 1 REVIEW KEY

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Brian Hawkins
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1 1) raw a motion map for the car on a balanced track. (he speed is CONSAN!) 2) etermine the speed of the car through photogate B for both positions. through Photogate A (sec) through Photogate B (sec) from Photogate A to B (sec) Speed (m/s) ISANCE IME A B /.0096= /.0102= ) Label the axes and draw a conceptual graph for the scenario in 1 and 2. (distance time graph) 4) What does the slope of he line from a d/t graph equal? Speed () 5) raw a conceptual graph for the data collected for a car traveling down this track.

2 6) Label and draw WO conceptual graphs for the lab data listed below. *create 1 distance/time graph and 1 velocity/time graph V 7) Complete the following data table. istance at A and B are the distance of the Flag! of B d t v d t v istance at A A (sec) at A istance at B B (sec) at B ) What is happening to the speed of the car in the data table? It is increasing. he time through B is decreasing so that means that the speed is increasing. 9) How does the speed of a car change as the slope of a line becomes steeper? A shallow slope indicates.. slower speed A steep slope indicates faster speed 10) What variables do not change throughout the experiment? Controls 11) Ms Lehman thinks that students who study longer for the test will get a higher grade. What are the independent and dependent variable? Independent - study time ependent - test grade

3 12) Complete the table by filling in the missing data points. of B d / t v d / t v istance at A A (sec) at A istance at B B (sec) at B from A to B (sec) ) Label and draw a conceptual VELOCIY-IME graph for the data shown above. V GES SLOWER! 14) Label and draw a conceptual distance time graph for the data shown above. LIKE I IS GOING UPHILL 15) raw a picture of an Experiment that would result in the data in question 12. Car going up ramp slowing down

16) Label each part of the graph describing the motion of the Cyborg.

line in the graph to the right. Include their speed and direction.

4 16) Label each part of the graph describing the motion of the Cyborg. Constant speed forward-faster than 1st constant speed SOPPE Constant speed forward Constant speed backward SOPPE 17) escribe the motion of the solid and the dotted line in the graph to the right. Include their speed and direction. Solid Line Constant speed moving forward (toward the object represented by the dotted line) otted Line Same constant speed as solid line, moving toward the object with the solid line. (moving in the opposite direction) hey are moving at the same constant speed but in different directions 18) Suppose you are walking home after school. he distance from school to your home is five kilometers. On foot, you can get home in 25 minutes. However, if you ride a bicycle (safely along Grass Lake Road), you can get home in 10 minutes. a. What is your average speed while walking? 5 km/25 minutes =.2km/minute v = d/t b. What is your average speed while bicycling? V = d/t = 5 km/ 10 min =.5 km/mi

19) When the Cubs travel on their tour bus to play the Cardinals of St. Louis at an average speed of 96 km/hr., for 5 hours; how far do they travel? = v x t (96km/hr) x 5hours= 480 km 20) In 0.

5 19) When the Cubs travel on their tour bus to play the Cardinals of St. Louis at an average speed of 96 km/hr., for 5 hours; how far do they travel? = v x t (96km/hr) x 5hours= 480 km 20) In 0.5 seconds, a projectile goes from 0 to 300 m/s. What is the acceleration of the projectile? a = 300m/s 0 m/s = 600 m/s/s or m/s 2.5 sec 21) A dragster in a race accelerated from stop to 5 m/s to 60 m/s by the time it reached the finish line. he dragster moved in a straight line and traveled from the starting line to the finish line in 8.0 sec. What was the acceleration of the dragster? a = 60 m/s 5 m/s = 6.88 m/s/s or m/s 2 8 sec 22) he space shuttle releases a space telescope into orbit around the earth. he telescope goes from being stationary to traveling at a speed of 1700 m/s in 25 seconds. What is the acceleration of the satellite? a = 1700 m/s -0 m/s = 68 m/s/s 25 sec

6 23) Ms. Lehman wanted to know if a new toothpaste brand just approved by the FA would increase the whiteness of her already pearly white teeth. She kept the length of brush time, the type of toothbrush and the water supply she used to brush with the same. She tried this new toothpaste for 1 month straight. At the end of 1 month Ms. Lehman noticed that her teeth looked 78% brighter (her Uncle the dentist helped her with this data). 24) What is the independent variable? toothpaste brand 25) What is the dependent variable? Whiteness of teeth 26) What is the control(s)? Length of brush time, type of toothbrush, water supply 27) What should she infer (conclude) from her observations? he new toothpaste improves the whiteness of teeth. 78% is a significant increase so we can conclude that it works! 28. Legend has it that the father of modern physics, Galileo, dropped 2 objects from the leaning tower of Pisa. If both objects landed after 3.35 seconds of freefall, how high were they dropped from? = 3.35 sec =? G = m/sec 2 d =.5 x 9.8 x 3.35 x 3.35 = m

36. It s a oss Up! #2 Complete the following table for a toss that lasted 3 total seconds: t Height d V Acceleration (s) (m/s) a m/s 2 1 0 0 14.7-9.8 If you use 3 seconds = 44.1 2 1.5 If you use 1.

7 36. It s a oss Up! #2 Complete the following table for a toss that lasted 3 total seconds: t Height d V Acceleration (s) (m/s) a m/s If you use 3 seconds = If you use 1.5 seconds = You will NO be tested on a problem like this so don t stress about it #1 # Create a istance- Graph for the picture below: (assume the position of the ground is 0) d 38. Create a istance- Graph for the picture below: (assume the position of the car is 0) d t t

Focus Questions: 3-1: Describe how objects speed up and slow down 3-2: Describes how objects change direction

Motion Graphing Focus Questions: 3-1: Describe how objects speed up and slow down 3-2: Describes how objects change direction Motion Graphing Speed Graphs A typical speed graph will have distance or position