4. A ball is attached to the end of a string. It is swung in a vertical circle of radius 0.75 m. What is the
minimum velocity that the ball must have to make it around the circle? Show all work.

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.