The horizontal distance d
which the golf ball travels in an interval of time given by
t2=2v0sin(θ)/g
is determined from the relation
d = x(t2)
= v0xt2
= v0 cos(θ)
2v0sin(θ) / g
= v02
sin(2θ) / g
Walter Lewin predicts the distance d
for three different angles,
θ=45o,
θ=30o
and
θ=60o,
of his shooting device with the horizontal.
His results are collected in the table below
|
angle
|
distance
|
observation
|
| | | |
|
45o
|
6.14±0.31 m
|
≅ 5.95 m
|
|
30o
|
5.31±0.37 m
|
≅ 5.30 m
|
|
60o
|
5.31±0.37 m
|
≅ 5.00 m
|
|
|