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6 21 24 12 15 PM PY 131 Test 1 Attempt review Courses 2024 2025 Started on Tuesday May 28 2024 4 06 PM State Finished Completed on Tuesday May 28 2024 4 57 PM Time taken 50 mins 29 secs Points 18 0 30 0 Grade 60 0 out of 100 0 CLICK HERE FOR THE EQUATION SHEET Information Question 1 Correct 1 0 points out of 1 0 A scientific idea that is so well established that it cannot be questioned is Select one A a theory B a hypothesis C an impossibility D a law The correct answer is an impossibility Question 2 Correct 1 0 points out of 1 0 In science facts Select one A may change B are more important than theories C mean very little D are absolute The correct answer is may change https moodle courses2425 wolfware ncsu edu mod quiz review php attempt 24888 cmid 62418 1 12 6 21 24 12 15 PM Question 3 Incorrect 0 0 points out of 1 0 PY 131 Test 1 Attempt review Courses 2024 2025 Which of the following is a scientific statement Select one A There are parts of the universe that will never be found by man B The moon is made of green cheese C Matter is filled with undetectable particles D There are things we will never know about E none of these The correct answer is The moon is made of green cheese A scientific hypothesis may turn out to be right or it may turn out to be wrong If it is a valid hypothesis there must be a test for proving it Question 4 Incorrect 0 0 points out of 1 0 Select one A right B wrong Question 5 Incorrect 0 0 points out of 1 0 The correct answer is wrong Select one A 10 m s B 50 m s C 100 m s D more than 100 m s The correct answer is 100 m s Ten seconds after starting from rest a freely falling object will have a speed of about https moodle courses2425 wolfware ncsu edu mod quiz review php attempt 24888 cmid 62418 2 12 PY 131 Test 1 Attempt review Courses 2024 2025 If a car increases its velocity from zero to 60 km h in 10 seconds its acceleration is If a rocket initially at rest accelerates at a rate of 50 m s s for one minute its speed will be 6 21 24 12 15 PM Question 6 Correct 1 0 points out of 1 0 Select one A 3 km h s B 60 km h s C 6 km h s D 10 km h s E 600 km h s The correct answer is 6 km h s Question 7 Incorrect 0 0 points out of 1 0 Select one A 500 m s B 3600 m s C 3000 m s D 50 m s E none of these The correct answer is 3000 m s https moodle courses2425 wolfware ncsu edu mod quiz review php attempt 24888 cmid 62418 3 12 PY 131 Test 1 Attempt review Courses 2024 2025 An object travels 8 meters in the first second of travel 8 meters again during the second second of travel and 8 meters again during the third second Its acceleration in meters per second per second is 6 21 24 12 15 PM Question 8 Incorrect 0 0 points out of 1 0 Select one A 0 B 5 C 8 D 10 E more than 10 The correct answer is 0 Question 9 Correct 1 0 points out of 1 0 It takes 6 seconds for a stone to fall to the bottom of a mine shaft How deep is the shaft Select one A about 60 m B about 120 m C about 180 m D more than 200 m The correct answer is about 180 m Question 10 Incorrect 0 0 points out of 1 0 Select one A 9 8 meters per second per second B less than 9 8 meters per second per second C greater than 9 8 meters per second per second The correct answer is 9 8 meters per second per second If you drop an object it will accelerate downward at a rate of 9 8 meters per second per second If you instead throw it downwards its acceleration in the absence of air resistance will be https moodle courses2425 wolfware ncsu edu mod quiz review php attempt 24888 cmid 62418 4 12 PY 131 Test 1 Attempt review Courses 2024 2025 If a projectile is fired straight up at a speed of 10 m s the time it takes to reach the top of its path is about 6 21 24 12 15 PM Question 11 Incorrect 0 0 points out of 1 0 Select one A 1 second B 10 seconds C 2 seconds D not enough information to estimate The correct answer is 1 second What is the acceleration of a car that maintains a constant velocity of 100 km h for 10 seconds Question 12 Incorrect 0 0 points out of 1 0 Select one A 0 B 10 km h s C 10 m h s D 1000 km h s The correct answer is 0 Question 13 Incorrect 0 0 points out of 1 0 Select one A 0 m s B 10 m s C D none of the above 10 m s The correct answer is 0 m s A man leans over the edge of a cliff and throws a rock upward at 10 m s Neglecting air resistance one second later the rock s speed is https moodle courses2425 wolfware ncsu edu mod quiz review php attempt 24888 cmid 62418 5 12 PY 131 Test 1 Attempt review Courses 2024 2025 The gain in speed each second for a freely falling object is about 6 21 24 12 15 PM Question 14 Correct 1 0 points out of 1 0 Select one A 0 B 5 m s C 10 m s D 20 m s E depends on the initial speed The correct answer is 10 m s Question 15 Correct 1 0 points out of 1 0 A bullet fired from a rifle begins to fall Select one A as soon as it leaves the barrel B after air friction reduces its speed C neither of these The correct answer is as soon as it leaves the barrel Question 16 Correct 1 0 points out of 1 0 Select one A gravitational field B atmosphere C both of these The correct answer is atmosphere Earth satellites are typically more than 100 km high so as to be above the earth s https moodle courses2425 wolfware ncsu edu mod quiz review php attempt 24888 cmid 62418 6 12 PY 131 Test 1 Attempt review Courses 2024 2025 6 21 24 12 15 PM Question 17 Correct 1 0 points out of 1 0 Which of the following is not a vector quantity Select one A acceleration B speed C velocity D none are vector quantities E all are vector quantities …

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