Question

i only need 7 and 9

6. Find the muzzle speed of the ball a. 5.52 m/s b. 4.17 m/s c. 6.34 m/s d. 4.88 m/s 7. From the following graph you can find theof an object in motion, which has a e. 7.23 m/s f. None of These magnitude of Velocity vs Time 16 14 12 10 0 Time(s) a. Displacement, 15 m e. Displacement, 2.5 m f. Final Velocity, 2.5 m/s g. Initial Acceleration, 2.5 m/s h. None of These b. Velocity, 15 m/s d. Length, 15 cm 8. In a buoyancy experiment, the measurements yield a graph of AP vs. Ah in which the best fitting line has equation y-1.030. What does this value signify? 9. In a centripetal force experiment a mass m = 400 grams, attached to a spring, is revolved around a circle with radius R 15 cm. The frequency is measured to be 1.5 rev/s. What is the experimental value of the centripetal force? a. 7.5 N b. 3.1 N c. 6.7 N d. 4.0 N е.53N f. None of these 10. In the same centripetal force experiment it is necessary to hang a 1.5 kg mass to pul 15 cm. What is the the mass connected to the spring in order to pull it to the same R spring constant of the spring? a. 28.7 N/m b. 65.3 N/m c. 98.0 N/m d. 13.1 N/m e. 90.4 N/m f. None of These

Answer 1

dv 12.0m/s_ m dt 4.0sec 3.0 7)f choice is (c) 9)centripetal force on themass FmRo rom thegraph we can find the accelerationa_- rev Teae mass-m-400 gms ;R-15cm ;ω-1.5- sec 9.42478 sec weplug the values in hand while using therelation gives F-5.30N choiceis l(e)5.30N