Music Express Physics Need Help With A Physics Worksheet?

Need help with a physics worksheet? - music express physics

I already have a theme of a physical package that I am at HW, but I need help on some issues. Here they are.

1) is the reduction of friction coefficient as a walk on the slippery floor of the car accident or when you walk on the sidewalk walking? How do you know?

2) In particular, why the person who is outside of a race by spinning at high speed, such as Music Express, always from another, as they crushed?

3) It takes 20 seconds until the car on top of the free fall. If the tower is 30 meters high, and we presume that the vehicle to maintain a constant speed, is what its velocity (speed) on the free-fall as it will take to the top of the tower?

4) The sound of Batman can be heard throughout the park, on any topic. Explain how the tone and sound, as you near your ear.