https://www.youtube.com/watch?v=5v9p5jBN_Hg

1-The two physics topics under consideration when investigating the long jump are...

a-friction and electricity

b-Pascal's Principle

c-horizontal and vertical speeds

2-According to the long jump video, what are the four phases of the long jump?

a-sommersalt, pitch, back handspring, double axle.

b-run-up, take-off, flight, landing

c-stretching, flying, cruising, crash

3-Under ideal conditions (no atmospheric interference of any kind), if I hit a golf ball at an angle of 25 degrees at an initial speed of 23 m/s, it will travel the same distance as a golf ball struck so it has an initial speed of 23 m/s at an angle of ___ degrees.

The golf ball question: A ball hit at an angle 70 degrees with the samespeed as ball hit at an angle of 20 degrees will travel the same horizontal distance. The one hit at 70 degrees will just stay in the airlonger. Kind of like the difference between a Patrick Mahomes "floater" (high angle) over a linebacker to Travis Kelsey as opposed to a pass zipped to an open man. Same speed, different angles, same horizontal distance.

So a golf ball hit 30 degrees hit at the same speed as golf ball hit at 60 degrees will travel the same horizontal distance.

Let's see 20, 70and 30, 60...let's do one more 40, 50...recognize a pattern in these pairs of numbers? How about 15, 75 or 25, 65? They add up to... :)

The optimum angle for the long jump is 34 degrees.

4-What is the optimal "take off" angle for the long jump?

5-If the initial velocity in the y-direction of an object leaving the ground is +10 m/s, what is the final velocity of the object when it returns to Earth? (+10 m/s reads as "positive 10 meters per second")

6-One more time: The acceleration on the object in the problem above is...

a-Can't determine

b-+9.8 m/s^2

c- -9.8 m/s^2

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