Version 3 1) Ballis at the top of a building Ball 2 is at the bottom of the building of height H. Ball 2 is
thrown up with a speed of 2V and Bal 1 is thrown down at a speed of 3V. Use the bottom to be
your reference level
Al Find an expression for the time at which they meet in terms of H and V,
B) Find the velocity at which they pass each other in terms of Vugh.
Find the height above the ground they meet in terms of Vg, h.
D) Plot graphs of attacceleration vs timel, -tſvelocity vs time), and x-t{position vs time), show
they intercept of the at graph and the x-t graph, show the y intercept and the slope of the
position is time graph atte.

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?