A 100 kg roller coaster is at the peak of the first hill 75 m above ground. A second later it is at the bottom of the hill.
a. Create an LOL chart for the following situation. Ignore friction and energy loss.
b. How fast was the roller coaster moving?

Ogle–2013–blg–0723 is an exoplanet that is similar to earth in size and proximity to its star. this exoplanet has mass m=4.18×1024kg and radius r=5.66×106m. an astronaut whose weight on earth is w=735n lands on the planet. a. calculate m, the mass of the astronaut. b. calculate gp? , the acceleration due to gravity on the surface of ogle–2013–blg–0723. c. calculate wp? , the weight of the astronaut on the surface of ogle–2013–blg–0723. d. calculate v, the minimum velocity required to put an object into orbit above ogle–2013–blg–0723. e. calculate t, the time required to complete an orbit around ogle–2013–blg–0723.

Work = force × a. work b. energy c. distance d. momentum

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these