SUBJECT: PHYSICS EVALUATION EXAM 1ST TRIMESTER STUDENT NAME: SCORE: TOT. SCORE: 57 PTS GRADE: DATE: GROUP: PONDARATION: TOPICS: KINEMATICS OF AN OPTION SPECIFIC INSTRUCTIONS: FOR THE NEXT TEST IS IMPORTAN TO UNDERSTAND THE NEXT POINTS - ALL THE EXAM MUST BE ANSWERED WITH PEN, IF IT’S ANSWERED WITH PENCIL THERE WON’T BE ANY CORRECTIONS - THE WHOLE EXAMN HAS A VALUE OF 50% OF YOUR GRADE - FOR THE FINAL RESULT IT SHOULD BE EXPRESSED ON NUMBER WITH THE MAXIMUM OF TWO DECIMALS AFTER ROUNDING, EXCEPT FOR WHOLE NUMBERS - ALL THE RESULTS SHOULD HAVE UNITS OF MEASUREMENT, OTHERWAYS THEY WON’T COUNT FOR THE FINAL SCORE - EACH SECTION OF THE EXAM DESCRIBES AN INSTRUCTION AND ALSO CONTAINS THE TOTAL VALUE OF POINTS POSIBLE TO GET. S1-INSTRUCTIONS: THE NEXT SECTION CONSISTS ON MATCHING THE COLUMNS KINEMATICS. WRITE THE LETTER ON THE BLANK SPACE (2 pts / each) (14 Total) OF A) THE RATE OF CHANGE IN VELOCITY UNDER A SPECIFIC TIME VELOCITY ACCELERATION B) RATE OF DISTANCE COVERED BY AN AMOUNT OF TIME SPEED C) GRAPHICAL LINE THAT SIMULATES THE MOTION D) THE CHANGE IN POSITION DISPLACEMENT POSITION E) TOTAL LENGTH OF THE TRAJECTORY FORM AN OBJECT DISTANCE F) TRAJECTORY THE RATE OF DISPLACEMENTS BY AN AMOUNT OF TIME G) THE PLACE THAT IS OCCUPIED IN AN SPECIFIC TIME S2-INSTRUCTIONS: THE NEXT SECTION CONSISTS ON DIFFERENT PROBLEMS RELATED TO KINEMATICS. IT’S IMPORTANT TO SOLVE THEM AND COMPLETE THE TABLE FOR BETTER GUIDENCE, EACH TABLE SECTION WILL COUNT AS A POINT ( 5 pts / each) (25 total) 1.- The speed of a nerve impulse in the human body, is about 100 m/s, let’s assume a human walking in the dark, accidently stubs its toe on the wall, estimate the time it takes to the impulse to travel all the way to the brain? DATA GIVEN MISSING VARIABLE FORMULA PROCEDURE RESULT 2. A person walks first at a constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. What is (a) her average speed over the entire trip? (b) her average velocity over the entire trip? DATA GIVEN MISSING VARIABLE FORMULA PROCEDURE RESULT 3.- An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. (a) Determine the distance traveled before takeoff? (b) Determine the final velocity before takeoff? DATA GIVEN MISSING VARIABLE FORMULA PROCEDURE RESULT 4.- A feather is dropped on the moon from a height of 1.40 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon? DATA GIVEN MISSING VARIABLE FORMULA PROCEDURE RESULT 5.- Rocket-powered sleds are used to test the human response to acceleration. If a rocket-powered sled is accelerated to a speed of 444 m/s in 1.83 seconds, then what is the acceleration? DATA GIVEN MISSING VARIABLE FORMULA PROCEDURE RESULT S3-SECTION: LOOK AT THE NEXT GRAPHS OF MOTION, AND FILL THE TABLE WITH WHAT IS NEEDED. (1pts each)(14 Total) Total Δx vavg Avg Speed t X X’ d Values v at 5s? v form 5s to 15s? a from 4s to 6s? Average Velocity? Average acceleration? Is it constant acceleration? What represent a from 0 to 10s? What represent a from 10 to 15s? What represents a from 15 to 20? S-4 INTRUCTIONS: THIS PART ISN’T NECESSARY TO ELABORATE, IF YOU DO ANSWER THIS SECTION, YOU WILL GET A NEGATIVE TWO POINTS (-2), FOR EACH CORRECT ANSWER AND NEGATIVE THREE POINTS FOR EVERY INCORRECT ANSWER. 1. A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4 m. Determine the acceleration of the bike.? 2. An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s2. The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the runway? 3. A car traveling at 22.4 m/s skids to a stop in 2.55 s. Determine the skidding distance of the car (assume uniform acceleration)? S-5 INSTRUCTIONS: THIS PART WILL GIVE YOU E XTRA POINTS, JUST IN CASE YOU ANSWER CORRECTLY. (1 PTS EACH) 1. WHAT IS THE FAVORITE POKÉMON OF YOUR TEACHER? 2. HOW OLD IS YOUR TEACHER? 3. WHAT GOES UP AND DOESN’T COME BACK DOWN? 4. WATER IS PASSING TRHOUG MY HOUSE, CATE OF MY HEART, THE ONE WHO DOESN´T GUESS IT, WILL BE CONSIDERED A DUMB GUESSER. WHAT IS IT?
