Author Question: A block of ice slides freely no air resistance, no friction down a slippery slope. The block ... (Read 122 times)

cdr_15 · **on:** Jul 29, 2018

A block of ice slides freely no air resistance, no friction down a slippery slope.

The block starts from rest at the top of the slope, where it has a vertical height of 4 m above the bottom of the slope and where it has a gravitational energy of 1000 J. The block's total energy a quarter of the way down the slope at a height of 3 m is
A) 250 J.
B) 500 J.
C) 750 J.
D) 1000 J.
E) greater than 1000 J.

Question 2

A conclusion that follows from E=mc2 is that, at the microscopic level,

A) matter is made of force fields.
B) tiny indestructible pieces of matter move through empty space.
C) there is only matter and antimatter.
D) all matter must vibrate at the speed of light.
E) matter is made of radiation.