Multiple choic physics

1.27 A rectangle has a length of 3.24 M and height of .532 m. To the correct number of sig figs is the area? A 1.72 M B 1.723 M C D

A

2.22 Chris is holding two softballs while standing on a balcony. She throws ball 1 straight up in the air and, at the same instant, releases her grip on ball 2, letting it drop over the side of the building. Which velocity graph in figure Q 2.22 best represents the motion of the two balls?

A

1.24 A bird flies 3.0 km due west and then 2.0 due north. Another bird flies 2.0 km due west and 3.0 KM due north. What is the angle between the net displacement vectors for the two birds? A 23 Degrees B 34 Degrees C 56 degrees D 90 degrees

A 23 degrees

2.23 suppose a plane accelerates from rest for 30 S, achieving a takeoff speed of 80 m/s after traveling a distance of 1200 M down the runway. A smaller plane with the same acceleration has a takeoff speed of 40 M/S. Starting from rest, after what distance will this smaller plane reach its takeoff speed? A 300 m B 600 M C 900 M D 1200 M

A 300 M

1.29 An objects average density P is defined as the ratio of its mass to its volume. P = M/V. The earth's mass is 5.94 X 10^24 ks and its volume is 1.08 X 10^12 km^3. What is the earth's average density? A 5.50 X 10^3 Kg/M^3 B 5.50 X 10^6 Kg/M^3 C 5.50 X 10^9 Kg/M^3 d 5.50 X 10^12 Kg/M^3

A 5.50 X 10^3 Kg/M^3

1.19 You throw a rock upward. The rock is moving upward, but it is slowing down. As we define the ground as the origin, the position of the rock is _____ and the velocity of the rock is _____ A Positive, positive B positive negative C negative positive D Negative Negative

A Positive, positive

STT 1.2 Three motion diagrams are shown. Which is a dust particle settling to the floor at constant speed, which is a ball dropped from the roof of a building and which is a descending rocket slowing to make a soft landing on mars?

A, Dust particle b dropping ball. c descending rocket

2.26 A car can go from 0 - 60 mph in 12 S. A second car is capable of twice the acceleration of the first car. Assuming that it could maintain the same acceleration at higher speeds, how much time will this second car take to go from 0-120 MPH? A 12 S B 9.0 S C 6.0 S D 3.0 S

A,12 S

Define particle

An object that can represented as a mass at a single point on space

circular motion

Any motion in which an object is moving along a curved path

2.24 Figure 2.25 shows a motion diagram with the clock reading ( in seconds) shown at each position. From T = 9 s to t=15 S the object is at the same position. After that, it returns along the same track. The positions of the dots for T>or equal to 16 S are offset for clarity. Which graph best represents the object's velocity?

B

STT 1.1 Which car is going faster? A or B? Assume they are equal intervals of time in between both videos

B

STT 1.7 P and Q are two vectors of equal length but different directions. Which vector shows the sum of P + Q?

B

STT 2 A bicycle is moving to the left with increasing speed. Which of the following motino diagrams illustrates this motion?

B

STT 2.4 An elevator is moving downward. IT is slowing down as it approaches the ground floor. Adapt the information in figure 2.25 to determine which of the following velocity graphs best represents the motion of the elevator?

B

1.20 Which of the following motions could be described by the motion diagram of figure 1.20? A Hockey puck B cyclist braking to a stop C a sprinter starting a race D a ball bouncing off the wall

B Cyclist breaking to a stop

2.21 which of the three drag racers in question 20has the greatest acceleration at t=0? A andy B Betty C Carl

B betty

2.20 velocity vs time graphs for three drag racers are shown in figure Q2.20 at t=5.0 s which car has traveled the farthest? A andy B betty C carl D all have traveled the same distance

B, Betty

2.25 a car can go from 0 to 60 mph in 7.0 S Assuming that it could maintain the same acceleration at higher speeds, how long would it take the car to go from 0-120 MPH? A 12 S B 14 S C 21 S D 28 S

B14 S

2.15 Figure Q 2.15 shows the position graph of a car traveling on a straight road. At which labeled instant is the speed of the car the greatest?

C

2.17 Figure Q 2.17 shows an object's position-versus-time graph. What is the velocity off the object at T=6s?

C

STT 2.3 Which velocity- versus time graph goes with the position versus- time graph on the left?

C

STT 2.5 A particle moves with the velocity-versus-time graph shown here. At which labeled point is the magnitude of the acceleration the greatest?

C

STT 1.4 Jane starts from her house to take a stroll in her neighborhood. After walking for 2 hours at a steady pace, she has walked 4 miles and is 2 miles from home. For this time, what was her speed? A 4 mph B 3 mph c 2 mph D 1mph

C 2 mph

1.22 A bird flies 3.0 KM due west and then 2.0 KM due north. what is the magnitude of the bird's displacement? A 2.0 km B 3.0 km C 3.6 km D 5.0 km

C 3.6 km

2.16 Figure 2.16 shows the position graph of a car traveling on a straight road. The velocity at instant 1 is ___ and the velocity at instant 2 is ____.

D

STT 2.1 Which position vs. time graph best describes the motion diagram to the left?

D

The earth formed 4.57x10^9 years ago. What is this time in seconds? a. 1.67x10^12 b. 4.01x10^13 c. 2.40x10^15 d. 1.44x10^17

D

1.28 The earth formed 4.57 X 10^9 years ago. What is this time in seconds? A 1.67 X10^12 S B 4.01 X 10^13 S C 2.40 X 10^ 9 S D 1.44 X 10^17 S

D 1.44 X 10^17 S

STT 1.6 Using the information in figure 1.23 what is the distance to the nearest CM in the triangle at the right? A 26 cm B 20 cm C 17 cm D 15 CM

D 15 cm

2.19 A car is traveling at vx= 20 m/s . The driver apples brakes and the car slows down at ax=-4.0 m/s^2 what is the stopping distance? A 5.0 M B 25 m C 40 M D 50 M

D 50 M

2.18 The following options describes the motion of four cars !-D Which car has the largest acceleration? A Goes from 0 M/S to 10 M/s in 5.0 S B Goes from 0 M/S to 5.o m/s in 2.0 s C Goes from 0 M/S to 20 m/s in 7.0 S D Goes from 0 M/S to 3.0 M/s in 1 S

D Goes from 0 M/S to 3.0 M/s in 1 S

STT 1.5 Rank in order from the fewest, the number of significant figures in the following numbers. A .43 B .0052 C .430 D 4.321 X 10^-10

D>C>B=A

STT 2.6 A cyclist is at rest at a traffic light. When the light turns green, has begins accelerating at 1.2 m/S^2. How many seconds after the light turns green does he reach his cruising speed of 6.0 M/S^2? A 1.0 S B 2.0 S C 3.0 S D 4.0 S E 5.0 S

E 5.0 S

An object that occupies only a single position in a motion diagram is at _____.

Rest

List the 4 basic types of motion

Straight-line, circular, projectile, rotational

1 Dimension motion

The motion of an object that can move only along a straight line

Motion Diagram

a series of images showing the positions of a moving object at equal time intervals

(Motion Diagram) A decreasing distance between the images shoes that the object is _____.

slowing down

(Motion Diagram) An increasing distance between the images shoes that the object is _____.

speeding up

projectile motion

the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth

Trajectory

the path followed by an object moving through space

STT 2.2 Four objects move with the velocity-versus-time graphs shown. Which object has the largest displacement between t=0 and t=2s?

B

1.23 Wedell seals make holes in sea ice so they an swim down to forage on the ocean floor below. Measurements for one seal showed that it dived straight down from such an opening reaching a depth of .30 km in a time of 5.0 minutes. What was the speed of the diving seal? A .60 M/S B 1.0 M/S C 1.6 M/S D 6.0 M/S E 10 M/S

B 1.0 M/S

1.18 A student walks 1.0 mi west and then 1.0 mile north, after ward how far is she from her starting point? A 1.0 mi B 1.4 mi C 1.6 mi D 2.0 Mi

B 1.4 miles

1.25 A woman walks briskly at 2.0 m/s how much wile will it take her to walk one mile? A 8.3 min B 13.4 min C 21.7 min D 30.0 Min

B 13.4 Min

1.26 Computer 3.24 M + .532 M to the correct number of Significant figures A 3.7 m B 3.77 M C 3.772 M D 3.7720 M

B 3.77 M

STT 1 What is the length of the hypotenuse of this triangle? ( 6 and 8 cm) A 6 cm b 8 cm C 10 cm D 12 cm E 14 cm

C 10 cm

STT 1.3 Sarah starts at a positive position along the x-axis. She then undergoes a negative displacement. Her final position A is postive B Is negative C Could be either positive or negative

C Could be either positive or negative

1.21 Which of the following options is described by the motion of figure Q 1.21? A an ice skater gliding across the ice B An airplane braking to a stop after landing C a car pulling away from a stop sign D a pool ball bouncing off a cushion and reversing direction

C a car pulling away from a stop sign

STT 2.7 A volcano ejects a chunk of rock straight up at a velocity of vy= 30 m/s. Ignoring air resistance , what will be the velocity Vy of the rock when it falls back into the volcano's crater? A >30 m/s B 30 m/s C 0m/s D -30 m/s E <-30m/s

D<-30 M/S

Motion

change of an object's position or orientation with time

(Motion Diagram) Images that are equally spaced indicate an object moving with ___.

constant speed

rotational motion

motion of a body that spins about an axis