A group of bike riders went on a 4-hour trip. During the first 3 hours, they traveled a total of 50. kilometers, but during the last hour, they traveled only 10. kilometers. What was the group's average speed for the entire trip

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.