PHYSICS 102-Quiz_1_Chapter 1.

Which of the following is NOT a derived unit? a. m2 b. m3 c. m d. m/s2 e. m/s status: correct (1.0) correct: c your answer: c feedback: Correct. 2 What happens to the period of a pendulum as its frequency is increased? a. the period decreases b. the period remains constant c. more information is needed to determine the answer. d. the period will increase or decrease, depending on the original value of the frequency. e. the period increases status: correct (1.0) correct: a your answer: a feedback: Correct. 3 A child on a swing swings back and forth 25 times in 35 seconds. What is the frequency of the swing? a. 1.4 Hz b. 35 Hz c. 0.029 Hz d. 25 Hz e. 0.71 Hz status: correct (1.0) This study source was downloaded by from CourseH on :04:56 GMT -05:00 correct: e your answer: e feedback: Correct. 4 A child on a swing swings back and forth 25 times in 35 seconds. What is the period of the swing? a. 0.71 s b. 35 s c. 0.040 s d. 25 s e. 1.4 s status: correct (1.0) correct: e your answer: e feedback: Correct. 5 In which of the following cases will the average speed and average velocity have different values? a. A car starts from rest and speeds up to a speed of 25 m/s, then travels at this speed for 1 hour. b. A car traveling at a speed of 25 m/s slows down to a stop in 10 s. c. A car starts from rest and speeds up to a speed of 25 m/s in 10 s. d. A car travels to the east, then turns around and travels to the west. e. A car traveling at a speed of 25 m/s slows down to 15 m/s, then speeds up again to a speed of 25 m/s. status: correct (1.0) correct: d your answer: d feedback: Correct. 6 Which of the following is an example of a vector quantity? a. 50 m b. 50 km/h [North] c. 50 km/h d. 50 m/s2 This study source was downloaded by from CourseH on :04:56 GMT -05:00 e. 50 m/s status: correct (1.0) correct: b your answer: b feedback: Correct. 7 A car is said to have a velocity of -25 m/s. What does the negative sign indicate? a. The car's velocity is increasing. b. It indicates nothing. c. The car's velocity is decreasing. d. The car is traveling in the positive direction. e. The car is traveling in the negative direction. status: correct (1.0) correct: e your answer: e feedback: Correct. 8 An escalator at a shopping mall moves with a velocity of 1.2 m/s [upwards] relative to the mall. A person on the escalator walks with a velocity of 1.0 m/s [upwards] relative to the escalator. What is the resultant velocity of the person relative to the mall? a. 0.2 m/s [upwards] b. 1.2 m/s [upwards] c. 2.2 m/s [upwards] d. 1.0 m/s [upwards] e. 0.2 m/s [downwards] status: correct (1.0) correct: c your answer: c feedback: Correct. This study source was downloaded by from CourseH on :04:56 GMT -05:00 9 An escalator at a shopping mall moves with a velocity of 1.2 m/s [upwards] relative to the mall. A person on the escalator walks with a velocity of 1.0 m/s [downwards] relative to the escalator. What is the resultant velocity of the person relative to the mall? a. 1.2 m/s [downwards] b. 0.2 m/s [downwards] c. 1.0 m/s [downwards] d. 2.2 m/s [downwards] e. 0.2 m/s [upwards] status: correct (1.0) correct: e your answer: e feedback: Correct. 10 In which of the following cases is the car NOT accelerating? a. the car slows down while going around a turn. b. the car speeds up from rest. c. the car travels at a constant speed on a straight road. d. the car travels at a constant speed while going around a turn. e. the car slows down to a stop.