front 1 In lab 1 Graphical Matching we determined the initial velocity of the ball by: A. Measuring it with a radar gun B. Measuring it with a photo gate C. Calculating it from the range of a horizontal launch D. Calculating it from the range of an angled launch | back 1 C. Calculating it from the range of a horizontal launch |
front 2 In lab 1 Graphical Matching to predict how long it would take for a ball to hit the floor, we would need to know. A. Its initial height B. Its initial vertical velocity C. Its initial horizontal velocity D. A. and B. only E. A. B. and C. | back 2 E. A. Its initial height, B. Its initial vertical velocity and C. Its initial horizontal velocity |
front 3 Which of the following descriptions matches this velocity versus time graph? A. Stay still for half a second, walk forward at constant speed for half a second, stand still for half a second, walk backward for one second, stand still for half a second. B. Stand still for half a second, accelerate forward for half a second, maintain constant forward velocity for half a second, slow down to a stop and then accelerate backwards over the course of one second, walk backward at constant speed for half a second. C. Stand still for half a second, accelerate forward for half a second, stop for half a second, accelerate backwards over the course of one second, stop for half a second. | back 3 B. Stand still for half a second, accelerate forward for half a second, maintain constant forward velocity for half a second, slow down to a stop and then accelerate backwards over the course of one second, walk backward at constant speed for half a second. |
front 4 Which position versus time graph best corresponds with the above velocity versus time graph? | back 4 B. The more curvy looking one |
front 5 The preliminary questions for Lab 3 Newton's Second Law ask you about hitting two balls with a baseball bat, the two ball were a baseball and: A. A basketball B. A bowling ball C. A pin-pong ball D. A golf ball | back 5 B. A bowling ball |
front 6 During an experiment with projectile motion, the initial velocity of a ball is 5.00 m/s, entirely in the horizontal direction. The ball is launched from an initial height of 2.00 m and lands on the ground. Neglecting air resistance... How long is the ball in the air? A. 0.639 s B. 0.452 s C. 1.327 s D. 0.426 | back 6 A. 0.639 s |
front 7 During an experiment with projectile motion, the initial velocity of a ball is 5.00 m/s, entirely in the horizontal direction. The ball is launched from an initial height of 2.00 m and lands on the ground. Neglecting air resistance... How far does the ball travel horizontally? A. 3.20 m B. 2.26 m C. 4.18 m D. 2.44 m | back 7 A. 3.20 m |
front 8 The maximum speed of an object falling in the presence of air resistance is called: A. Terminal velocity B. Ballistic velocity C. Final velocity D. Air restricted velocity | back 8 A. Terminal velocity |
front 9 The lab manual claims that air resistance is proportional to: A. velocity B. velocity squared C. A. or B. depending on the situation D. neither A. nor B. | back 9 C. A. or B. depending on the situation |
front 10 What are the units of a force (in N) versus acceleration (in m/s2) plot? A. N/m B. (m/s2)/N C. kg D. s | back 10 C. kg |
front 11 In your experiment, you tried to test the relationship F=ma. Your data did not show this to be exactly true. What is the best explanation for the discrepancy? A. Human error B. The model F=ma is not exactly true for these experiments. C. The force probe and accelerometer were not perfectly accurate and there were unaccounted for frictional forces. | back 11 C. The force probe and accelerometer were not perfectly accurate and there were unaccounted for frictional forces. |
front 12 Air resistance on a falling coffee filter is proportional to (according to the results obtained by almost every group): A. velocity B. square root of velocity C. velocity squared | back 12 C. velocity squared |
front 13 Two sets of coffee filters are falling at terminal velocity. The first set has two filters and takes 2.50 seconds to fall one meter. The second set has 4 filters. How long does it take to fall one meter? A. 2.50 seconds B. 1.77 seconds C. 1.25 seconds D. Impossible to determine | back 13 B. 1.77 seconds |
front 14 In the centripetal acceleration lab we will measure: A. The acceleration of an object spinning on a turn table B. The angular velocity of the turn table C. The force on the spinning object D. A and B E. A and C F. B and C G. A, B, and C | back 14 D. A. The acceleration of an object spinning on a turn table and B. The angular velocity of the turn table |
front 15 For the centripetal acceleration lab manual two preliminary questions dealt with: A. you on a merry-go-round B. a ball on a string C. a satellite orbiting the earth D. None of the above | back 15 A. you on a merry-go-round |
front 16 The graph of centripetal acceleration versus angular velocity was a: A. Straight line with zero intercept B. Parabola C. Natural Log D. Exponential Decay | back 16 B. Parabola |
front 17 If the angular velocity is kept the same and you move closer to the center of a merry-go-round, the centripetal force required to keep you on the merry-go-round: A. decreases B. increases C. stays the same D. there's no centripetal force in this case, the force is centrifugal instead | back 17 A. decreases |
front 18 For each question, consider the free-fall portion of the motion of a ball tossed straight upward, starting just as the ball is released to just before it is caught. Assume that there is very little air resistance. What form or forms of energy does the ball have while momentarily at rest at the top of the path? A. Potential energy only B. Kinetic energy only C. Both kinetic and potential energy D. Neither kinetic nor potential energy | back 18 A. Potential energy only |
front 19 For each question, consider the free-fall portion of the motion of a ball tossed straight upward, starting just as the ball is released to just before it is caught. Assume that there is very little air resistance. What form or forms of energy does the ball have while in motion the very instant before it hits the floor? A. Potential energy only B. Kinetic energy only C. Both kinetic and potential energy D. Neither kinetic nor potential energy | back 19 B. Kinetic energy only |
front 20 During the collision in Lab 7 Ballistic Pendulum, we expect to discover that what quantity is conserved? A. Total mechanical energy B. Kinetic energy C. Potential energy D. Momentum | back 20 D. Momentum |
front 21 During the subsequent upward swing of the pendulum in Lab 7 Ballistic Pendulum, we expect to discover that what quantity is conserved ? A. Total mechanical energy B. Kinetic energy C. Potential energy D. Momentum | back 21 A. Total mechanical energy |
front 22 If the total mechanical (kinetic plus potential) energy of the ball in Lab 6 Energy of a Tossed Ball just before it lands is slightly less than just after you threw it we should conclude: A. The law of conservation of total energy is flawed B. There were errors in the data collection C. The equipment is not accurate enough D. There was a non-conservative force which removed some mechanical energy | back 22 D. There was a non-conservative force which removed some mechanical energy (aka air resistance) |
front 23 Which graph best represents the velocity of a ball thrown straight up in the air while it is in the air. | back 23 A. The one that is straight down |
front 24 Cars have airbags because by using them we can reduce the change in momentum a person has to go through during a crash. A. True B. False | back 24 B. False |
front 25 In the impulse-momentum lab, we primarily tested: A. the equation FΔt = mvf - mvi B. Whether or not momentum is conserved in collisions. C. Whether or not momentum is conserved when pulling a cart with a rubber band D. Whether or not momentum is conserved in an isolated system | back 25 A. the equation FΔt = mvf - mvi |
front 26 In the rotational inertia experiment, a mass is hanging from a string and falls with a relatively small acceleration of 0.1 m/s2. In this case, the tension in the string is equal to the weight of the hanging mass. A. True B. False | back 26 B. False |
front 27 What is caused directly and immediately the moment a torque is applied to a rotational object initially at rest? (Pick the best answer only) A. Rotational displacement B. Rotational velocity C. Rotational acceleration D. Rotational inertia | back 27 C. Rotational acceleration |
front 28 In the angular momentum experiment, what is conserved during the collision between the rolling ball and the rotating platform? A. Angualr momentum only B. Angular momentum and linear momentum only C. Angular momentum and energy D. Nothing | back 28 A. Angualr momentum only |
front 29 In the angular momentum experiment, how do we determine the initial speed of the launched ball? A. We use projectile motion to calculate the initial speed B. We use a photo-gate to measure the initial speed C. We don't need to determine the initial speed | back 29 A. We use projectile motion to calculate the initial speed |
front 30 For the rotational dynamics lab 9, what pulley radius would produce the most acceleration? A. the largest B. the smallest C. this radius doesn't matter for finding the acceleration | back 30 A. the largest |
front 31 For the rotational dynamics lab last week, what was the magnitude of the downward acceleration of the falling weight that caused the torque? A. less than gravity (i.e. a = 9.8 m/s2) B. exactly equal to gravity C. more than gravity | back 31 A. less than gravity (i.e. a = 9.8 m/s2) |
front 32 Archimedes' principle states that: A. the buoyant force on an object is equal to the weight of the displaced fluid B. the change in water pressure between to depths is equal to pgh C. the pressure added to a fluid in one place increased the fluid pressure over the whole volume | back 32 A. the buoyant force on an object is equal to the weight of the displaced fluid |
front 33 According to the Archimedes' principle lab manual "the ratio of the weight of a given volume of the substance to an equal volume of water" is called the: A. specific gravity B. density C. Archimedes' quotient D. water ratio | back 33 A. specific gravity |
front 34 For the angular momentum experiment, what kind of collision did you observe? A. Elastic B. Partially inelastic C. Totally inelastic | back 34 C. Totally inelastic |
front 35 According to the law of conservation of angular momentum, what would you expect if a small launcher were placed on a freely-rotating arm with large mass, and it fired a much lighter projectile? A. The arm would rotate backward at a higher velocity than the projectile B. The arm would rotate backward at the same velocity as the projectile C. The arm would rotate backward at a lower velocity than the projectile D. The arm would not rotate | back 35 C. The arm would rotate backward at a lower velocity than the projectile |
front 36 The impulse applied by a force is equal to: A. The initial momentum of an object before the force is applied B. The final momentum of an object after the force is applied C. The change in momentum D. The average momentum | back 36 C. The change in momentum |
front 37 Suppose you wanted to deliver the same amount of impulse, but with a force half as large as before. To keep the impulse the same, you should apply the force for: A. Half as long B. Twice as long | back 37 B. Twice as long |
front 38 In the ballistic pendulum experiment, the potential energy of the pendulum and ball together when they reach their maximum height is equal to the kinetic energy of the ball and pendulum together just after the ball hits the pendulum: A. True B. False | back 38 A. True |
front 39 In the ballistic pendulum experiment, the potential energy of the pendulum and ball together when they reach maximum height is equal to the kinetic energy of the ball just before the ball hits the pendulum. A. True B. False | back 39 B. False |