Maria ran in a cross-country race. She claims that she accelerated as the race wore on. She wants draw a graph using data collected during the race.
Which of the following characteristics of Maria's graph would best support her claim?
F. The line on a speed-versus-time graph goes up as time increases.
G. The line on a distance-versus-time graph goes up as time increases.
H. The line on a speed-versus-time graph does not go up or down as time increases.
3. None of the above

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

Iwill give brainliest if you answer right : )

How do we measure or think of speed in the united states?