A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.1 cm down into the water and then lets go. The toy then proceeds to bob up and down. It bobs up and down 16 times in a minute. a. What is the Period of the motion? b. What is the Frequency of motion? c. What is the Amplitude of the motion? d. Where is the toy at time t=7.03 seconds? Explain with evidence how you did this

Q9. A vertical spring stretches 3.9 cm when a 10-g object is hung from it. The object is replaced with a block of mass 25 g that oscillates up and down in simple harmonic motion. Calculate the period of motion.

An ambulance with its siren on is heading east along a straight highway at 65 mph. A car also moves on the same road. In which case will the driver of the car perceive that the frequency of the siren is lower? Select one: a. The car is moving west at 65 mph and is behind the ambulance. b. The car is moving west at 65 mph and is in front of the ambulance. c. The car is moving east at 65 mph and is in front of the ambulance. d. The car is moving east at 65 mph and is behind the ambulance.

6. A wrecking ball used to demolish buildings swings from 10 m long cable. What is the period of the wrecking ball as it swings? *       a. 4.5 s       b. 6.3 s       c. 7.2 s       d. 3.6 s       e. None of the above