Work & Gravitational Potential Energy

Work & Spring Potential Energy

Conservative & Non-conservative force

Path Independence of conservative force

Determining Potential Energy values

Elastic Potential Energy

Conservation of Mechanical Energy

Check point…

Check Point 1

Check point 2-HW If this system starts at 1.0 meters per second in the clockwise direction, what speed will the blocks have after moving 2.0m?

Check point 3-HW A skier going over a small, 5 meter tall hill has a speed of 3 m/s at the top, and a speed of 10 m/s at the bottom. Has their mechanical energy been conserved?

Check point 4- HW A block (m=5.0kg) is released from point A and it slides down the incline ( θ= 30 degrees) where the coefficient of kinetic friction is μ=0.3 It goes 5.0m and hits an ideal spring with a spring constant k=500 Newtons per meter. While it is being acted upon by the spring, assume it is on a frictionless surface. a.How far does the block go up the plane on the rebound from the spring? b.How far is the spring compressed?

Homework A block is given an initial speed ϑ up a ramp with an incline θ. The coefficient of kinetic friction between block and ramp is μ. a.In terms of ϑ,θ,μ find how far up the ramp the block goes d. b.Given an initial velocity of 3.0 meters per second, μ =0.50, and θ=30 degrees, find d.

Chp-5

The stone thrown vertically upward with 10 m/s initial speed. Find the height when stone’s kinetic energy equal its potential energy. Weight of object at the Pole is 2 times greater than at the Equator. Find Planet’s rotational period if the planet’s density is known. The small object is sliding on the sphere which radius is R given. What exactly max. height the object will leave from Sphere.