Are my calculations of g correct?- Projectile Motion (1 Viewer)

[Dedopcat]

Hey, we've done an investigation in physics, and I'd just like to make sure I'm calculating correctly cause my values of g are totally whacked out, its projectile motion off the edge of a table onto the floor

table height :0.75m
distance travelled: 0.19m
t: 0.2, 0.3, 0.4 seconds

so using change in y = ut + 1/2at^2

t=0.2
0.75 = 0 + 1/2 x a x 0.2^2

0.75/o.2^2 = 1/2a

37.5= a = g

t=0.3
0.75/0.3^2 = 1/2a

16.67 = a = g

t=0.4
0.75/0.4^2 = 1/2a
9.375 = a = g

0.4 is the closest, have i missed something really obvious?

if not what are some reasons why these are really different

Thankyou so much

 

[BadMeetsEvil]

Hey, we've done an investigation in physics, and I'd just like to make sure I'm calculating correctly cause my values of g are totally whacked out, its projectile motion off the edge of a table onto the floor

table height :0.75m
distance travelled: 0.19m
t: 0.2, 0.3, 0.4 seconds

so using change in y = ut + 1/2at^2

t=0.2
0.75 = 0 + 1/2 x a x 0.2^2

0.75/o.2^2 = 1/2a

37.5= a = g

t=0.3
0.75/0.3^2 = 1/2a

16.67 = a = g

t=0.4
0.75/0.4^2 = 1/2a
9.375 = a = g

0.4 is the closest, have i missed something really obvious?

if not what are some reasons why these are really different

Thankyou so much

it's correct but this just means that you did some experiential errors when observing the time when you got 0.2 and 0.3

 

[Dedopcat]

haha, great

thankyou