A roller coaster has a mass of 500 kg. It drops from rest at the top of a hill that's 57 m tall. How fast is it going when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2.

Sort the characteristics of solids, liquids, and gases into the correct columns.

How would one be able to travel in time?

An object has a charge of 4.5 c is it negative or positive

AL (OH) 2 is__ an acid a base a salt

Two charges, - q0 and - 4q0 are a distance l apart. these two charges are free to move but do not because there is a third charge nearby.

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.

Give a sentence with the word velocity in it