Question 9 Use the following diagram to answer the question below. Not yet answered Marked out of 1.0 1.50 m 2 25 m Flag question A B C -2.00 mC +3.00 mC -2.00 mc Calculate the net electrostatic force on Charge A. Select one: O a. 2.40 x 10 5 N [left] O b. 2.62 x 1073 N [right] O c. 2.14 x 104 N [right] O d. 3.60 x 104 N [left]Question 8 Two point charges produce an electrostatic force of 6.3/ x 10 Not yet answered Marked out of Determine the electrostatic force produced if charge 1 is doubled, charge 2 is tripled and the distance between them is reduced by half. 1.0 Flag question Select one: O a. 1.65 x 10 IN O b. 6.87 x 10 3 N O c. 4.12 x 10 - N O d. 2.06 x 10 - Ngestion / Physics 30 students were investigating different methods of charging. They made the following observations: it yet swered A) Grounding is required to complete this method of charging. irked out of B) Rubbing an ebonite rod with fur results in electrons being transferred from the fur to the rod. C) A neutral electroscope becomes negatively charged when the top is touched with a negatively charged object. Remove D) If a system contains + 4 C of charge and -6 C of charge, the net charge of the system is - 2 C. Methods of Charging Physics Principles * (The same principle may be used more than once). 1. Conduction 5. Conservation of energy 2. Friction 6. Conservation of mass-energy 3. Induction 7. Conservation of charge 4. All of the above 8. Conservation of nucleons Select the method of charging and the physics principle that explains the observation. Physics Principle Observation Method of Charging 4 B C DQuestion O During a thunderstorm in Calgary, a 1900 kg car slides at a speed of 5.00 m/s into a 1300 kg car stopped at a red light. Upon the collision, the cars lock together and the combined mass slides Not yet into the intersection. answered Marked out of The kinetic energy of the combined mass after the collision, and the type of collision, respectively are: 1.0 Flag Select one: question O a. 2.38 x 104 J and inelastic O b. 2.38 x 104 J and elastic O c. 1.41 x 104 j and inelastic O d. 1.41 x 104 J and elastic Question / Physics 30 students were investigating different methods of charging. They made the following observations: ot yet nswered A) Grounding is required to complete this method of charging. arked out of B) Rubbing an ebonite rod with fur results in electrons being transferred from the fur to the rod. C) A neutral electroscope becomes negatively charged when the top is touched with a negatively charged object. Remove D) If a system contains + 4 C of charge and -6 C of charge, the net charge of the system is -2 C.Clear my choice Question 5 A professional baseball pitcher throws a 0. 145 kg baseball with a velocity of 40 m/s [north]. The ball is batted to the pitcher with a velocity of 49 m/s [south]. Answer saved What is the magnitude of the change in the ball's momentum? Marked out of 1.0 Select one: Flag O a. 1.305 kg.m/s question O b. 1.3 kg-m/s O c. 12.905 kg.m/s O d. 13 kg.m/s Clear my choicecollision? A billiard ball collides with a second identical ball in an elastic head-on collision. What is the kinetic energy of the system after the collision compared with the kinetic energy before the Select one: O a. Unchanged O b. Two times as great O c. Four times as great O d. One fourth as great Clear my choiceJestion 3 An egg dropped on the road usually breaks, while one dropped on the grass usually does not. The egg doesn't break when dropped on the grass because iswer saved arked out of Select one: O a. the time interval for stopping is greater Flag jestion O b. the time interval for stopping is less O c. the impulse is greater O d. the impulse is less Clear my choiceA block of mass m slides with a speed vo on a frictionless surface and collides with another mass M which is initially at rest. The two blocks stick together and move with a speed of v, /3. In terms of mass m, mass M is and the physics principle you used to determine this is Select one: O a. m/3 and physics principle 5 O b. m/2 and physics principle 5 O c. 2m and physics principle 4 O d. 3m and physics principle 4 An egg dropped on the road usually breaks, while one dropped on the grass usually does not. The egg doesn't break when dropped on the grass because