How does a car’s average speed differ from its instantaneous speed?

a. average speed is computed for the entire duration of a trip and instantaneous speed is measured at a particular instant.

b. instantaneous speed is measured at each particular instant and average speed is the sum of the instantaneous speeds.

c. average speed is computed for each particular instant and instantaneous speed is the sum of the averages.

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)