Physics Test - 11/15/2019

Genevieve rode her bicycle for 1.7 hr along a road that had a marker posted every 3 km. On average, she passed one of these markers every 12 min. What was her average speed during her 1.7 hr trip? a) 15 km/hr b) 25 km/hr c) 30 km/hr d) 20 km/hr e) 10 km/hr

a) 15 km/hr

The graph shows the movement of a bicyclist plotted at several points in time. What is the average speed of the bicyclist? a) 40 meters/minute b) 120 meters/minute c) 15 meters/minute d) 20 meters/minute e) 13.33 meters/minute

a) 40 meters/minute

A car starts at a position of 3 km and moves to a final position of 8 km. What is the displacement of the car? a) 5 km b) -5 km c) -10 km d) 3 km e) 7 km

a) 5 km

A model airplane travels 12 m at a speed of 7.2 m/s. The airplane then travels an additional unknown distance at a speed of 14 m/s. The total time is 67 s for the entire flight. What is the unknown distance the plane flies at 14 m/s? a) 910 m b) 960 m c) 1.4 m d) 23 m e) 940 m

a) 910 m

What does the slope of a position versus time graph represent? a) velocity b) force c) distance d) speed e) acceleration

a) velocity

Thomas starts at the position (-3, -3) m in the x-y plane and undergoes the following displacements: d1 = (-6,3) m, d2 = (3,3) m, and d3 = (3,-6) m. What is Thomas's final position? a) (-6, -6) b) (-3, -3) c) (0, 0) d) (-3, 6) e) (-6, 10)

b) (-3, -3)

From this velocity versus time graph of an object that moves on a straight line, what is the distance traveled from 6 s to 9 s? a) 8 m b) 10 m c) 12 m d) 4 m e) 6 m

b) 10 m

Two motorcycles approach each other on the same road. One has a constant velocity of +16 m/s and the other has a constant velocity of -12 m/s. If at time t = 0 s they are 330 m apart, how long would it be before they meet each other? a) 28 s b) 12 s c) -83 s d) 83 s e) 21 s

b) 12 s

An aircraft takes off from Austin, TX, flies 130 km west, lands, and then takes off again and flies 360 km east. If you define east as positive and west as negative, what is the plane's final position relative to Austin? a) -50 km b) 230 km c) 300 km d) 490 km e) -230 km

b) 230 km

A ball is +9 m from the origin and moves -5.0 m. What is the ball's final position? a) -45 meters b) 4.0 meters c) 14 meters d) 94.0 meters e) 33 meters

b) 4.0 meters

Which of the following is not a property of displacement? a) Displacement describes a change in position. b) Displacement is equal to the total distance traveled by an object in motion. c) Displacement is equal to the final position of an object minus the initial position of the object. d) Displacement can be negative. e) Displacement is a vector.

b) Displacement is equal to the total distance traveled by an object in motion.

The motion of a dog is plotted in the position versus time graph shown. Which of the following is the description of the dog's motion that best matches the complete graph? a) The dog waited for a while and then ran 40 m. b) The dog ran 40 m, stopped for a while, and then returned to the starting point. c) The dog ran 40 m, stopped for a while, and then continued running another 40 m in the same direction. d) The dog ran 40 m, ran back to the starting point, and then stopped for a while. e) The dog ran continuously for a distance of 40 m.

b) The dog ran 40 m, stopped for a while, and then returned to the starting point.

The position versus time and velocity versus time graphs for the motion of an ErgoBot are shown. Its position and velocity at five different times is labeled on both graphs. At which time during its motion is the Ergobot at a negative position but moving forward? a) time 2 b) time 4 c) time 3 d) time 1 e) time 5

b) time 4

Alice starts at (8, 8) m and moves displacements of d1 = (-5, 13) m, d2 = (6, 20) m, and d3 = (-1, -12) m. What is Alice's total displacement? a) (1, 33) m b) (8, 29) m c) (0, 21) m d) (-12, -5) m e) (2, 45) m

c) (0, 21) m

The graph shows the motion of a toy car. What is the speed of the car in the time interval between 6 and 8 s? a) 25 cm/s b) 20 cm/s c) 10 cm/s d) 5.0 cm/s e) 15 cm/s

c) 10 cm/s

What is the average speed of a car that moves 830 m in 26 s? a) 22000 m/s b) 26 m/s c) 32 N d) 830 km/h e) 0.031 h

c) 32 N

A woman drove 480 km from Los Angeles to San Francisco in 8 hr. What was her average speed for the trip? a) 80 km/hr b) 100 km/hr c) 30 km/hr d) 60 km/hr e) 200 km/hr

d) 60 km/hr

The graph shows the distance traveled by five runners, A, B, C, D, and E, over a period of time. Which runner had the highest speed? a) Runner B b) Runner C c) Runner D d) Runner E e) Runner A

d) Runner E

You are solving a problem that involves the volume and velocity of two different objects. Which of these is the best choice for naming your variables? a) v1 = volume of the first object, v2 = volume of the second object, v3 = velocity of the first object, v4 = velocity of the second object b) m1 = volume of the first object, m2 = volume of the second object, t1 = velocity of the first object, t2 = velocity of the second object c) Q1 = volume of the first object, Z2 = volume of the second object, R3 = velocity of the first object, J4 = velocity of the second object d) V1 = volume of the first object, V2 = volume of the second object, v1 = velocity of the first object, v2 = velocity of the second object e) V = volume of the first object, V = volume of the second object, v = velocity of the first object, v = velocity of the second object

d) V1 = volume of the first object, V2 = volume of the second object, v1 = velocity of the first object, v2 = velocity of the second object

The graph shows the motion of a car's distance plotted against time. In which time period was the car's speed the slowest? a) iii (20 minutes to 30 minutes) b) i (0 minutes to 10 minutes) c) ii (10 minutes to 20 minutes) d) iv (30 minutes to 40 minutes) e) v (40 minutes to 50 minutes)

d) iv (30 minutes to 40 minutes)

This position versus time graph shows the motion of a vehicle. During which section does the vehicle have the greatest velocity? a) section IV b) section I c) section II d) section III e) section V

d) section III

How would you rearrange the equation xf = xi + vt to solve for t? a) t = xf + xi / v b) t = v / xf -xi c) t = v(xf + xi) d) t = xf - xi / v e) t = v / xf + xi

d) t = xf - xi / v

Starting at (-2,-1) cm, a toy car has the following displacements: (3,-6) cm, and (-3, 6) cm. What is the final position of the car? a) (-5, 3) cm b) (0, 2) cm c) (1, 0) cm d) (8, -4) cm e) (-2, -1) cm

e) (-2, -1) cm

Starting from the origin, a toy car moves first to (19, 18) cm, and then to (9.0, 10) cm. What is the final position of the car relative to the initial position? a) (10, 9.0) cm b) (19, 28) cm c) (28, 28) cm d) (28, 19) cm e) (9.0, 10) cm

e) (9.0, 10)

A car starts at a position of -4 km and moves to a final position of 9 km. What is the total distance traveled by the car? a) -10 km b) 5 km c) 9 km d) -5 km e) 13 km

e) 13 km

Clio gets into an elevator and travels 90 m straight up in a time of 3 seconds. She then travels the opposite direction, straight down, for 73 m in a time of 20 seconds. What is her average speed over the 23 second period? a) 160 m/s b) 60 m/s c) 0.74 m/s d) 17 m/s e) 7.1 m/s

e) 7.1 m/s

The graph shows the distance traveled by five cars (1, 2, 3, 4, and 5) over a period of time. Which car traveled at an average speed of 75 km/hr? a) Car 4 b) Car 2 c) Car 1 d) Car 3 e) Car 5

e) Car 5

Two students rolled a ball and measured its distance from the start at a series of different times. Their data are presented in the table and graph shown. What characteristic of the ball's motion is represented by the slope of the graph? a) displacement b) distance c) inertia d) acceleration e) speed

e) speed