for question2, options are : increases, decreases, stays the same.

for question4 options are : at its rest position, at max displacement, in between rest and displacement

A skateboard of mass, m, and speed, v, is traveling along a straight path. If the mass of the skateboard were cut in half and its speed 1was doubled, what would be the effect on the kinetic energy? Select one: Q a. The new kinetic energy will be double the original kinetic energy. 0 b. The new kinetic energy will be the same as the original kinetic energy. 0 c. The new kinetic energy will be four times iarger than the original kinetic energy. 0 d. The new kinetic energy will be half of the originai kinetic energy. A stone is dropped from the top of a cliff. As it fails the kinetic energy , the gravitational potential energy |:|, and the mechanical energy Assume that air friction acts on the stone. Select the best response that completes each blank. Use the following diagram to answer this question: anmvummwhmm will. If the mass on the end of the spring INCREASES, which of the following experimental observations would you observe? Select one: D a. The frequency of the vibration would increase. 0 b. The frequency and period would be unchanged. 0 c. The frequency of the vibration would decrease. 0 d. The period of vibration would decrease. Consider a mass attached to a spring oscillating horizontally in simple harmonic motion (SHM). The magnitude of the acceleration will be greatest The magnitude of the restoring force will be greatest : . The magnitude of the velocity will be greatest . The difference between longitudinal vs transverse waves is that: Select one: C) a. Longitudinal waves have vibrations parallel to the direction of travel. 0 1). Longitudinal waves transmit more energy through a medium. 0 c. Transverse waves transmit more energy through a medium. 0 (1. Transverse waves have vibrations parallel to the direction of travel. The safe speed for a car driving through a curve is at a maximum when the road is dry. How does the maximum safe speed change if the road is icy and the coefcient of friction is reduced to one quarter of the original coefcient? Select one: Q a. The maximum safe speed goes down to 75% of the original speed. 0 b. The maximum safe speed goes down to 50% of the original speed. 0 c. Not enough information is provided to answer this problem. 0 d. The maximum safe speed goes down to 25% of the original speed