Free Fall Problems

Physics ninja looks at 3 different free fall problems. We calculate the time to hit the ground, the velocity just before hitting the ground. We apply the kinematic equations to look at free fall when you throw an object straight up or down.

[Basic-Tron]

Thanks Ben Affleck. Highly appreciate it!

[johnjoseph]

I really took the advantage of your lecture. I studied kinematic in 1995. But your lecture retained them quickly to my memory.

[vaishnavi_]

On FREE FALL This is the best video ever which I didn't found anywhere on whole YT ...I am so glad I found it and now my free fall concept is crystal you so much sir !!

[kald_]

A) Drop Ball = 3:56
B) Throw Ball Up = 10:04
C) Throw Ball Down = 20:11

[nextdoortutor]

I wish I can give u a hug irl. These videos are SOOO HELPFUL. STEP BY STEP. YOU didn't skip a single step, matter of fact you showed us multiple ways to do it with diff formulas. You're an absolute GOAT. Thank you! truly an inspiration

[Celineekonia]

Can you do that examples to me please...
Q1.A ball is thrown upwards with an initial speed of 20 ms-1.
a) how far does the ball rise in 1s?
b)how long does it take to reach the highest point of its motion?
c)what is the maximum height reached by the ball?

Q2.An object falls vertically from the edge of a building and strikes the ground 40 m below.
a)calculate the velocity of the object as it strikes the ground.
b)how long did it take the object to fall 40 m?
c)what is the velocity of the object half way down?

Q3.A golf ball is thrown vertically upwards with initial velocity of 25 m/s and returns to the thrower in 5 s.
a)what is the velocity of the ball at the highest point?
b)how long did it take to reach the highest point?
c)what is the highest point reached by the by?
d)calculate the total distance traveled by the ball.
e)what is the total displacement of the ball?
f)draw a velocity - time graph representing the motion of the ball over the 5 s, showing the following:
1.initial velocity
2.final velocity
3.time to reach the top
4.section representing upwards motion
5.section representing downward motion... please !!!

[バンド楽しいうさぎ大好き]

Incredible! Thank you so much for emphasising on the sign convention.

[SolicitorAP]

Total flight time includes it being thrown up and then going down, why didn't you use 8.84m for delta y. Why only 7, do you forget the time it took to reach the top and then fall??? Flight time is how long was it in the air, it being thrown up should still be included in flight time... Makes no sense

[sandypark]

You explain the concept clearly and beautifully! I subscribed to your channel!

[emmyrev]

Super helpful! I was having trouble figuring out which values correlate with the equations before, this clears things up!

[NathnaeltofikNatitof]

I recognize that it works the same for the result if we use the negative sign reversible for acceleration due to gravitation and velocity interchangeably for the 3 kinematics equations!

[anotherdeadchannel]

How is the velocity before hitting the ground in the last problem positive? Time stamp: 24:30
-9.8(0.631) = -6.1838; -6.1838 - 8 (Initial velocity) = -14.1838. Even without calculating, a positive y velocity would mean relative from launch the object is traveling up and here it's not. Please correct me if I'm wrong 🙏

[watchmccloud]

Never have I ever seen such an ad infested video

[royaleopo]

Thank you for this good explanation you explained it even better than my teacher! *tips hat*

[gconcepcion]

Use the formula a = Δ

Q. When the ice block was at point Y, the rope slipped through the caterer’s hands, and the block fell. The acceleration of the block toward the ground was 9.8 m/s2. What was the velocity of the block after 0.2 seconds? m/s

[Basic-Tron]

Not only did you explain the thing I was stuck on for ages but your teaching style is AWESOME. I wish I had a teacher like

[jaspernash]

on the second problem when you are finding the speed before hitting the ground should the intial velocity not be 0m/s and the height be 8.84 meters. As the ball would speed up a lot more from a height of 8.84 meters rather than 7 meters.

[saveconsult]

Absolutely! My kids are studying online and this video presents the concept in the clearest way. Thank you. Subscribed

[chinnieman]

For the first one your answer is right but working is very in accurate, you teach like a math teacher than a actual physics teacher

[student]

1) In the second task (can we find
the displacement of the ball in the air of the y axis - trajectory of the ball in the whole movement?)
2) Also can we find the displacement of the x axis (how far the ball landed from the starting position?);
3) Can we separate the different segments deltaYAB and deltaYBC and calculate the paths, which the ball spent in the air?
I hope you can give me a hint.