Question: Which one, temperature, velocity, acceleration, or displacement, is not a vector quantity?
Answer Choices:
A) Temperature
B) Velocity
C) Acceleration
D) Displacement
Answer: a. Temperature
Question: An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50 s. If west is chosen as the positive direction, what is the sign associated with the average velocity of the object?
Answer Choices:
A) 0, no sign
B) Positive
C) Negative
D) Cannot be determined
Answer: a. 0, no sign
Question: An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50 s. If west is chosen as the positive direction, what is the average speed of the object?
Answer Choices:
A) 0.50 m/s
B) 1.00 m/s
C) 0.25 m/s
D) 1.25 m/s
Answer: a. 0.50 m/s
Question: A cheetah can run at approximately 100 km/hr and a gazelle at 80.0 km/hr. If both animals are running at full speed, with the gazelle 70.0 m ahead, how long before the cheetah catches its prey?
Answer Choices:
A) 12.6 s
B) 14.0 s
C) 16.2 s
D) 10.0 s
Answer: a. 12.6 s
Question: A railroad train travels forward along a straight track at 80.0 m/s for 1,000 m and then travels at 50.0 m/s for the next 1,000 m. What is the average velocity?
Answer Choices:
A) 61.5 m/s
B) 65.0 m/s
C) 70.0 m/s
D) 75.0 m/s
Answer: a. 61.5 m/s
Question: A European sports car dealer claims that his car will accelerate at a constant rate from rest to 100 km/hr in 8.00 s. If so, what is the acceleration?
Answer Choices:
A) 3.47 m/s²
B) 4.00 m/s²
C) 5.00 m/s²
D) 6.00 m/s²
Answer: a. 3.47 m/s²
Question: A European sports car dealer claims that his product will accelerate at a constant rate from rest to a speed of 100 km/hr in 8.00 s. What is the speed after the first 5.00 s of acceleration?
Answer Choices:
A) 17.4 m/s
B) 20.0 m/s
C) 22.5 m/s
D) 25.0 m/s
Answer: a. 17.4 m/s
Question: A v vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the acceleration of the ball is zero. What is the velocity of the ball at t = 5 s?
Answer Choices:
A) The velocity of the ball is not changing
B) The velocity is increasing
C) The velocity is decreasing
D) The velocity is zero
Answer: a. The velocity of the ball is not changing
Question: An a vs. t graph is drawn for a car moving in one direction. The graph shows a horizontal line at a = 5 m/s² from t = 0 s to t = 5 s. What is the velocity of the ball at t = 5 s? Assume the car is initially at rest.
Answer Choices:
A) 25 m/s
B) 20 m/s
C) 30 m/s
D) 15 m/s
Answer: a. 25 m/s
Question: A 50-g ball traveling at 25.0 m/s is bounced off a brick wall and rebounds at 22.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.50 ms, what is the average acceleration of the ball during this time interval?
Answer Choices:
A) 13,400 m/s²
B) 12,500 m/s²
C) 10,000 m/s²
D) 15,000 m/s²
Answer: a. 13,400 m/s²
Question: A ball is pushed with an initial velocity of 4.0 m/s. The ball rolls down a hill with a constant acceleration of 1.6 m/s². The ball reaches the bottom of the hill in 8.0 s. What is the ball’s velocity at the bottom of the hill?
Answer Choices:
A) 17 m/s
B) 10 m/s
C) 8 m/s
D) 15 m/s
Answer: a. 17 m/s
Question: A cart is given an initial velocity of 5.0 m/s and experiences a constant acceleration of 2.0 m/s². What is the magnitude of the cart’s displacement during the first 6.0 s of its motion?
Answer Choices:
A) 36 m
B) 42 m
C) 50 m
D) 66 m
Answer: d. 66 m
Question: When a drag strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight line path is a constant -7.5 m/s². What displacement does it undergo during this deceleration period?
Answer Choices:
A) 200 m
B) 240 m
C) 260 m
D) 280 m
Answer: b. 240 m
Question: A drag racer starts from rest and accelerates at 10 m/s² for the entire distance of 400 m (1/4 mile). What is the velocity of the race car at the end of the run?
Answer Choices:
A) 80 m/s
B) 85 m/s
C) 89 m/s
D) 95 m/s
Answer: c. 89 m/s
Question: A Cessna aircraft has a lift-off speed of 120 km/hr. What minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240 m?
Answer Choices:
A) 2.31 m/s²
B) 2.50 m/s²
C) 2.70 m/s²
D) 3.00 m/s²
Answer: a. 2.31 m/s²
Question: A rock is thrown straight up with an initial velocity of 24.5 m/s. What maximum height will the rock reach before starting to fall downward? Take acceleration due to gravity as 9.80 m/s².
Answer Choices:
A) 25.0 m
B) 30.6 m
C) 35.0 m
D) 40.0 m
Answer: b. 30.6 m
Question: A rock is thrown straight up with an initial velocity of 19.6 m/s. What time interval elapses between the rock’s being thrown and its return to the original launch point?
Answer Choices:
A) 3.50 s
B) 4.00 s
C) 4.50 s
D) 5.00 s
Answer: b. 4.00 s
Question: A baseball is released at rest from the top of the Washington Monument. It hits the ground after falling for 6.0 s. What was the height from which the ball was dropped? Ignore air resistance.
Answer Choices:
A) 1.5 x 10² m
B) 1.6 x 10² m
C) 1.7 x 10² m
D) 1.8 x 10² m
Answer: d. 1.8 x 10² m
Question: A rock, released at rest from the top of a tower, hits the ground after 1.5 s. What is the speed of the rock as it hits the ground? Ignore air resistance.
Answer Choices:
A) 10 m/s
B) 12 m/s
C) 15 m/s
D) 18 m/s
Answer: c. 15 m/s
Question: Human reaction time is usually about 0.20 s. If your lab partner holds a ruler between your finger and thumb and releases it without warning, how far can you expect the ruler to fall before you catch it?
Answer Choices:
A) 10 cm
B) 15 cm
C) 20 cm
D) 25 cm
Answer: c. 20 cm
Question: A hiker walks 200 m west and then walks 100 m north. In what direction is her resulting displacement?
Answer Choices:
A) 26.6° N of W
B) 45° N of W
C) 60° N of W
D) 30° N of W
Answer: a. 26.6° N of W
Question: A taxicab moves five blocks due north, five blocks due east, and another two blocks due north. Assume all blocks are of equal size. What is the magnitude of the taxi’s displacement, start to finish?
Answer Choices:
A) 6.4 blocks
B) 7.5 blocks
C) 8.6 blocks
D) 10 blocks
Answer: c. 8.6 blocks
Question: The following force vectors act on an object: i) 50.0 newtons at 45.0° north of east and ii) 25.0 newtons at 30.0° south of east. What is the magnitude of the resultant force and its angle relative to the easterly direction?
Answer Choices:
A) 40.0 newtons at 20.0°
B) 50.0 newtons at 25.0°
C) 60.4 newtons at 30.0°
D) 61.4 newtons at 21.8°
Answer: d. 61.4 newtons at 21.8°
Question: A string attached to an airborne kite is maintained at an angle of 40° with the horizontal. If a total of 120 m of string is reeled in while bringing the kite back to the ground, what is the horizontal displacement of the kite in the process? Assume the kite string doesn’t sag.
Answer Choices:
A) 75 m
B) 82 m
C) 92 m
D) 100 m
Answer: c. 92 m
Question: Jack pulls a sled across a level field by exerting a force of 110 N at an angle of 30° with the ground. What are the parallel and perpendicular components, respectively, of this force with respect to the ground?
Answer Choices:
A) 55 N, 95 N
B) 95 N, 55 N
C) 100 N, 60 N
D) 110 N, 30 N
Answer: b. 95 N, 55 N