A seesaw is a class 1 lever
Parts:
Load- The force applied to the lever
Fulcrum- in the middle
Effort- what lifts the load
so in a seesaw with 2 people, whoever is using their feet to push the seesaw up is the effort while the other person is the load. This changes depending on who is pushing the seesaw. the joint/thing between the two people is the fulcrum.
Answer:
(a) 
(b) 1.71
Explanation:
(a) The difference in the times of travel in the two case = 
This difference is the time in the transparent material. With a thickness of 35.0 cm, the speed in the material is

(b) The refractive index of the material is the ratio of the velocity of light in vacuum to its velocity in the material. Using speed of light in vacuum as
, the refractive index,
, is

Answer:
vf = 0
Explanation:
Since the initial height hi = 0, we can rewrite the energy equation as
vf^2 = vi^2 - 2ghf = (10 m/s)^2 - 2(10 m/s^2)(5 m) = 0
Therefore, his final velocity vf is
vf = 0
Explanation:
Average acceleration is the change in velocity over the change in time:
a = (v − v₀) / t
In the x direction:
aₓ = (6.11 cos (-54.2°) − 5.33 cos (37.9°)) / 2.00
aₓ = -0.316 m/s²
In the y direction:
aᵧ = (6.11 sin (-54.2°) − 5.33 sin (37.9°)) / 2.00
aᵧ = -4.11 m/s²
Answer:
Explanation:
We will use the KE equation you wrote here and fill in what we are given:
and isolating the m:
which gives us
m = .50 kg