For people wondering: the displacement is -73.0m, not 73.0m. This is because the ball is going DOWN in reference to its starting position, the top of the building. This should fix any negative square root issues when solving.
You are correct this is false. I am a physics teacher and he made a mistake that a lot of my students make. He was going to have to take the squareroot of a negative number which you can not do. He has two options here he can either decided to call the downward direction the positive direction and thus change is acceleration to positive 9.8 or he can continue to assume the upward direction is positive and change the distance to -730 meters because the distance the object actually travels is down.
For people wondering: the displacement is -73.0m, not 73.0m. This is because the ball is going DOWN in reference to its starting position, the top of the building. This should fix any negative square root issues when solving.
I think d is +ve as it is still above "0" if d=-ve ball will be underground. This gives V=-ve downwards. ?
I have mid terms tomorrow and don't really get physics but this video truly did help a lot !😁
mimumal Nice to hear that it helped! Best wishes on midterms.
really...
mimumal Rt
the a/g should be 9.8m/s2. Because every object in freefall should be positive in gravity.
Tell me about it
Lol. Thanks. Best wishes in learning.
You definitely just saved my life. Thank you so much!!!
11 years Later and here I am watching this thank you Kinggg 🎉🎉
thankk uu so muchhh!! 🤞🤞
U R THE BEST
wrong equations it has a negative sign after you multiply the A and D. you cant squarerrot if it has a negative sign dude
James Kisai the Y should be -ve Coz the object goes down , so -ve multiply -ve will be +ve , he didn’t mention this
This helped a lot. Thanks
How do you find the time when it hits the ground?
thank you, sir
sir i don't understand why the g is negetive??? in our book it's given positive everywhere. Does it comes from the graph of x and y axis?
Because all things goes down is all negative
but its not going against gravity, if I were to trow the ball up, then g is negative. @@towerdive0081
is it +9.8 ?
Thankyou! :)
Why a=-9.8
38,2 m/s or 137.5 km/h (g=10 though not 9,81)
i guess
It is negative because of "when it hits the ground" therefore it is negative. G=-
Nice video
lmao wrong
Wrong answer..- x + = -
How do you multiply (-19.6)(73.0) and get positive 1,430.8 false asf. Someone get their teacher
You are correct this is false. I am a physics teacher and he made a mistake that a lot of my students make. He was going to have to take the squareroot of a negative number which you can not do. He has two options here he can either decided to call the downward direction the positive direction and thus change is acceleration to positive 9.8 or he can continue to assume the upward direction is positive and change the distance to -730 meters because the distance the object actually travels is down.
How come acceleration be negative in this sum
the d (displacement) is supposed to be negative since it is displacing downward. when you multiply the (-19.6) and the (-73) then you get a positive.
@@andrawaali the object is falling down so it’s negative