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13 questions
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- Q1Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?The car with the larger mass will have less inertia than the car with the smaller mass.The car with the smaller mass will require less force to stop than the car with the larger mass.The car with the larger mass will maintain its velocity while traveling down the hill.The car with the smaller mass will take longer to stop than the car with the larger mass.60sSP2a
- Q2Four students raced toy cars on a track. The mass and the acceleration of each car is recorded in the table below. Which toy car had the greatest applied force?314260sSP2a
- Q3Sometimes tectonic plates do not move easily past one another, and the plates become stuck. Forces build up, and when the plates finally move, tension is released, as shown below. The sudden movement of the plates is caused by —unbalanced forcesthe mass of the platesgravitational forcethe weight of the plates60sSP2a
- Q4During a demonstration of Newton’s laws of motion, a student used the setup shown in Figure 1. The student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as shown in Figure 2. Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.60sSP2a
- Q560sSP2a
- Q6A student jumps off a sled toward the west after it stops at the bottom of an icy hill. Based on the law of action–reaction, in what direction will the sled most likely move as the student jumps off?EastSouthWestNorth60sSP2a
- Q7The unusual strength of a glue makes it able to hold a heavy object, or load, as shown in the diagram below. If the load exerts a strong downward force, the glue —causes the load to accelerate upwarddestroys the forceexerts a stronger downward forceexerts an upward force that is equal to the downward force60sSP2a
- Q860sSP2a
- Q9A student lets a toy car roll four times down a ramp that is 1 m long. Each time the student covers the surface of the ramp with a different material. The student measures the time it takes the car to roll down the ramp and records the results in the table below. Which of these would be the best conclusion based on the data in the table?Different surfaces affect how fast a toy car accelerates.Air resistance is the greatest factor in limiting the acceleration of different toy cars.Different toy cars travel at different speeds.Gravity has little effect on the speed of toy cars on different surfaces.60sSP2a
- Q10The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table below. Which vehicle has the greatest acceleration as it enters the highway?TruckSUVSedanCoupe60sSP2a
- Q11The list includes six situations. Which objects in the list experience an unbalanced force?The ball, the car, and the birdThe book, the ball, and the carThe book, the ball, the can, and the swingThe can, the swing, and the bird60sSP2a
- Q12During a lab investigation, students added four 50 g masses to two boxes and arranged the boxes so that they were motionless on a pulley, as shown in the diagram. The students then followed the procedure described in the box. The students recorded their observations after each procedure and reset the pulley system to the original conditions. During which procedures did students observe an unbalanced upward force on Box 1?Procedures 1, 3, and 5Procedures 1, 2, and 3Procedures 3 and 4Procedures 4 and 560sSP2a
- Q13NASA’s space shuttle program was active from 1981 until 2011. The photograph shows rockets carrying a space shuttle off the launchpad. How can Newton’s law of action–reaction best be applied to explain the movement of a rocket?As the fuel burns, the mass of the rocket decreases.As the fuel burns, the rocket moves fasterAs the fuel burns, gases push against the rocket, moving it upward.As the fuel burns, gases move out of the rocket and reduce air resistance.60sSP2a
