Answer:
V = 7.5 m/s
Explanation:
Projectile motion is a two dimensional motion experienced by an object or particle that is subjected near the surface of the Earth and moves along a curved path under the influence of gravity only. The path followed by projectile motion is called projectile path.
As the cat followed the projectile path, and we know that in projectile motion the horizontal component of the velocity remains constant throughout its motion. So there is no acceleration along horizontal path.
Given data :
Height = y = 0.65 m
Horizontal distance = x = 2.7 m
Gravitational acceleration = g = 9.81 m/s²
Velocity when cat slid off the table = V = ?
As the cat slides off horizontally, So there is no vertical component of velocity or vertical component of velocity is zero.
Using 2nd equation of motion
y = 0.5 gt²
0.65 = 0.5*9.8*t²
t² = 0.1326
t = 0.36 s
Velocity when cat slid off the table = V = x / t
V = 2.7 / 0.36
V = 7.5 m/s
Observations are used to record the results of an experiment.
For this case, in the next item we have gravitational potential energy:
An apple in a tree.
Suppose we define our reference system at the floor level.
Suppose the apple is at a height h from the floor and has mass m.
The gravitational potential energy of the apple is given by:
U = mgh
Where,
m: apple mass
h: height of the apple with respect to the floor
g: acceleration due to gravity
Answer:
C) an apple on a tree
The sun is at the solstices on roughly June 21 and December 21.
June 21 is the "Summer" solstice in the Northern hemisphere.
At that time, the sun is directly overhead at a point on the Tropic
of Cancer, about 23.5° North of the equator.
December 21 is the "Summer" solstice in the Southern hemisphere.
At that time, the sun is directly overhead at a point on the Tropic
of Capricorn, about 23.5° South of the equator.
