A roller-coaster car has a potential energy of 800 kJ and a kinetic energy of 170 kJ at point A in its travel. At the low point of the ride, the potential energy is zero, and 60 J of work have been done against friction since it left point A. What is the kinetic energy of the roller-coaster at its low point?

Asquare is dilated by a scale factor of 1.25 to create a new square. how does the area of the new square compare with the area of the original square? a)the area of the new square is 1.25 times the area of the original square. b)the area of the new square is 2.50 times the area of the original square. c)the area of the new square is 1.252 times the area of the original square. d)the area of the new square is 1.253 times the area of the original square.

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?