Similar to 3.10.16 in Rogawski/Adams. A road perpendicular to a highway leads to a farmhouse located 1 km away. An automobile travels past the farmhouse at a speed of 90 km/h. How fast is the distance between the automobile and the farmhouse increasing when the automobile is 3 km past the intersection of the highway and the road

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

A40 kilogram skier starts at the top of a 12 meter heigh slope. at the bottom she is traveling 10 meters per second how much does she lose to friction? a. 4,704 joules b. 2,704 joules. c.2,000 joules d. she doesn’t lose any because mechanical energy is conserved. 35