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- 1. Horizontal mass spring system (http://okphysics.com/5-65-oscillation-of-a-spring-mass-system-in-a-uniform-electric-field/) Position(x) A 5 10 15 Time(t) -A The above graph showsthe positionof amass on a horizontal springsystem.Whichof the following statement is true about the instantaneous velocity of the mass and the force acting of the mass at t=15? A. Velocityiszero;there'snoforce actingon the mass. B. Velocityispositive;force actingonthe mass isto the left. C. Velocityispositive;force acting onthe massis tothe right. D. Velocityiszero;force actingonthe mass isto the left. E. VelocityisPositive;there'snoforce actingonthe mass.
- 2. The correct answeris D.