GPE and KE Problems

Find the velocity of an object rolling down the hill that has 175 J of kinetic energy and a mass of 15 kg. Use the formua $$\sqrt[]{\frac{2KE}{m}}$$  

A 20 kg mass is raised to a height of 5m. What is the Potential Energy in this position? Use the formula PE= mgh. g=9.8 m/s^2

(a)  

What is the distance raised above the ground if the object has a mass of 30kg and a potential energy of 784 J. Use the formula $$h=\ \frac{PE}{mg}$$  

g= 9.8 $$\frac{m}{s^2}$$  

What unit is Energy measured in?

$$m=\frac{2KE}{v^2}$$  Calculate the mass of a truck that is traveling 80 m/s and has the kinetic energy of 5,500,000 J. Use the formula seen here.

The PE of a 50 kg object is 20,000 J. How high was the object to have this amount of potential energy? Use the formula $$h=\frac{PE}{mg}\ \ where\ g=\ 9.8\ \frac{m}{s^2}$$  

What unit is used to measure height?

What is the relationship between kinetic energy and velocity?

What is the difference between kinetic energy and potential energy.

Find the Kinetic energy of a 60 kg object rolling down the hill with a velocity of 8 m/s. Use the formula KE= $$\frac{1}{2\ }mv^2$$  

(a)