Can someone answer this question?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects