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Exam 1
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Questions in this quiz (20)
1A car accelerates from 10.0 m/s to 30.0 m/s at a rate of 3.00 m/s2. How far does the car travel while accelerating?
- A399m
- B80.0m
- C133m
- D226m
2A 4.0-kg object is moving with speed 2.0 m/s. A 1.0-kg object is moving with speed 4.0 m/s. Both objects encounter the same constant braking force, and are brought to rest. Which object travels the greater distance before stopping?
- ABoth objects travel the same distance.
- Bthe 1.0-kg object
- CIt is impossible to know without knowing how long each force acts.
- Dthe 4.0-kg object
3A ball is thrown vertically upward from the surface of the earth. The ball rises to some maximum height and falls back toward the surface of the earth. Which of the following statements concerning this situation is true if air resistance is neglected?
- AAs the ball rises, its acceleration vector points upward.
- BThe velocity and acceleration of the ball always point in the same direction
- CThe ball is a freely falling body for the duration of its flight.
- DThe acceleration of the ball is zero when the ball is at its highest point
4A rock is released from rest from a hot air balloon that is at rest with respect to the ground a few meters below. If we ignore air resistance as the rock falls, which one of the following statements is true?
- AAs the rock falls, its acceleration is 9.8 m/s2, directed downward.
- BAfter the ball is released it falls at a constant rate of 9.8 m/s every second.
- CThe rock is considered a freely falling body after it is released.
- Dall of these.
5An automotive test driver travels due north in a prototype hybrid vehicle at 30 mi/h for 2 hours. She then reverses her direction and travels due south at 60 mi/h for 1 hour. What is the average speed of the vehicle?
- A45 mi/h, north
- B40 mi/h, north
- C40 mi/h
- Dzero mi/h
6Complete the following statement: A displacement vector
- Ais always directed along a tangent to the object's path.
- Bhas a magnitude that always equals the distance the object traveled from its initial position to its final position.
- Cis directed from an object's final position toward its initial position.
- Dis directed from an object's initial position toward its final position.
7Complete the following statement: For an object moving at constant velocity, the distance traveled
- Aincreases for each second that the object moves.
- Bdecreases for each second that the object moves.
- Cis the same for each second that the object moves.
- Dcannot be determined, even if the elapsed time is known.
8How is the standard of time, the "second," defined in the International System of Units?
- Ausing a standard pendulum that has a length of exactly one standard meter.
- Busing a high precision cesium (atomic) clock.
- Cusing the frequency of the light emitted from the ideal gas krypton.
- Dusing a portion of the time for a single rotation of the Earth.
9In dimensional analysis, the units for speed are
- A[L]/[T]
- B[T]/[L]
- C[L]/[T]2
- D[L]2/[T]2
10In which of the following situations is the displacement of the ball directly proportional to the elapsed time?
- Athe ball rolls with constant velocity.
- Ba ball rolling uphill experiences a decreasing acceleration.
- Ca ball rolling with velocity, v, is given a constant acceleration.
- Da ball at rest is given a constant acceleration.
11Ping-pong ball A is filled with sand. Ping-pong ball B is identical to A, except that it is empty inside. Both balls are simultaneously dropped from rest from the top of a building. which of these two balls has the greater acceleration due to gravity, if any, as they fall?
- ABall A
- BBall B
- CTheir acceleration is zero.
- DThey have the same acceleration.
12The period of a pendulum is the time it takes the pendulum to swing back and forth once. If the only dimensional quantities that the period depends on are the acceleration of gravity, g, and the length of the pendulum, ℓ, what combination of g and ℓ must the period be proportional to?
- A(root) g/l
- Bg/ℓ
- Cgℓ2
- D(root) gℓ
13The speedometer on a car's dashboard measures which of the following quantities?
- Ainstantaneous velocity
- Baverage speed
- Cinstantaneous speed
- Daverage velocity
14Which of the following can cause a car to have an acceleration?
- Aneither (a) nor (b)
- Bboth (a) and (b)
- CThe steering wheel.
- DThe brakes on the car.
15Which of the following quantities can be determined from the slope of a velocity versus time graph for an object in motion?
- Anone of these.
- Bacceleration
- Cdistance traveled
- Dvelocity
16Which of the following quantities is defined as the distance traveled divided by the elapsed time for the travel?
- Aaverage velocity
- Baverage acceleration
- Cinstantaneous velocity
- Daverage speed
17Which of the following statements concerning unit conversion is false?
- AOnly quantities with the same units can be added or subtracted.
- BUnits can be treated as algebraic quantities.
- CThe fact that multiplying an equation by a factor of 1 does not change an equation is important in unit conversion.
- DUnits have no numerical significance, so 1.00 meter = 1.00 feet.
18Which of the following statements must be true if the expression x = 0.5(v+vo)t is to be used?
- Aair resistance must be taken into account.
- Ba is constant
- Cv is constant.
- Dx is constant.
19Which of the following units cannot be added together, even if the proper conversions are made?
- Aseconds and slugs
- Bfeet and centimeters
- Chours and years
- Dgrams and kilograms
20Which one of the following is the longest length?
- A10^5 micrometers
- B10^4 millimeters
- C10^2 centimeters
- D10^0 meters
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- Physics (Final Exam) Quiz on Exam 1, created by Kate T on 10/12/2018.
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- Kate T
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- English
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