Author Question: Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cubic yard of concrete ... (Read 124 times)

karateprodigy · **on:** Jul 27, 2018

Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cubic yard of concrete that is five times as dense as water? (1 m = 1.094 yd, and 1 m3 of water has a mass of 1,000 kg.)

A) 764 kg
B) 6546 kg
C) 2420 kg
D) 8733 kg
E) 3819 kg

Question 2

A ball is released moving straight up at 15. m/s. At some time later it is falling downward at 15. m/s. What was the magnitude of its average velocity over this time period?

A) 0. m/s
B) 30. m/s
C) 15. m/s
D) 7.5 m/s
E) 22. m/s