A ball with a mass of 2 kg rolls on a flat surface. It starts rolling with an initial velocity of 2 m/s, and after a while, its velocity drops to 1.8 m/s. What is the final energy of the ball? a. 1.8 J
b. 4 J
c. 3.24 J
d. 2 J

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative

One soccer player (a) is moving at 4 km/h when she kicks the ball while another soccer player (b) is moving at 8 km/h. what statement accurately compares their kinetic energy if they have the same mass? a) both soccer players have the same kinetic energy. b) player b has twice the kinetic energy of player a. c) player b has four times the kinetic energy of player a. d) their kinetic energy can't be compared without knowing their mass.

If the moon rises at a given location at 6: 00 p.m. today, about what time will it rise tomorrow night?