Shanghai American School - Puxi

PHYSICS 1

The graph above shows the position x as a function of time for the center of mass of a system of particles of total mass 6.0 kg. For a very short time interval around 2.0 s, an external force is exerted on an object in the system. What is the resulting change in momentum of the system? (A) 52 kg•m/s (B) 6 kg•m/s (C) -6 kg•m/s (D) -18 kg•m/s Three objects can only move along a straight, level path. The graphs below show the position d of each of the objects plotted as a function of time t. 2. The magnitude of the momentum of the object is increasing in which of the cases? AP PHYSICS 1 Test Booklet Unit 5 Summative Questions AP Physics 1 Page 1 of 33 (A) II only (B) III only (C) I and II only (D) I and III only (E) I, II, and III 3. A 0.050 kg tennis ball is moving to the left at 10 m/s when it is hit by a tennis racket that is moving to the right. The magnitude of the force exerted on the ball by the racket as a function of time is shown in the figure above. What is the speed of the ball after the collision with the racket? (A) 30 m/s (B) 50 m/s (C) 70 m/s (D) 90 m/s Test Booklet Unit 5 Summative Questions Page 2 of 33 AP Physics 1 Two identical spaceships are traveling in deep space, far from any planets or stars. The ships travel in the same direction, with the slower one directly behind the faster one. The ships are connected by a cable attached to a spool, so that the part of the cable outside the ships can be made longer or shorter as needed. The cable is used to bring the ships to the same speed for a transfer of cargo. The graph above shows the speed of the two ships during a 10 s interval. 4. Does at least one of the ships have its engine turned on during the time interval shown, and what evidence indicates so? (A) Yes, because Ship 2 is speeding up. (B) Yes, because the momentum of the two-rocket system increases. (C) Yes, because an engine is needed to keep the system moving. (D) No, because the cable alone could be responsible for making Ship 1 slow down and Ship 2 speed up. 5. Which of the following graphs best represents the net force Fnet exerted on the two-ship system?