Answer:
F = 62.4 N
Explanation:
We must solve this problem in two parts, the first with energy to find the speed with which it reaches the grass and with impulse to determine the strength in the grass
Let's look for the speed of arrival to the grass, write the energy in two points
Initial
Em₀ = U = m g h
Point 2, just by touching the grass
Em₂ = K = ½ m v²
Em₀ = Em₂
m g h = ½ m v²
v = √ 2gh
v = √( 2 9.8 2.8)
v = 7.4 m/s
Let's calculate the momentum until it stops
I = F t = m vf -m v₀
I = 0-0.15 (-7.4)
I = 1.11 N s
We must find the time during which the apple stops, let's use kinematics to find the average acceleration
= v = 7.4 m/s
² = v₀² + 2 a y
0 = v₀² + 2 a y
a = v₀² / 2y
a = 7.4²/2 0.066
a = 414.85 m / s²
Now let's look for the time to stop with this acceleration
= v₀ + at
0 = v₀ + at
t = v₀ / a
t = 7.4 / 414.85
t = 0.0178 s
Let's calculate with the momentum
I = F t
F = I / t
F = 1.11 / 0.0178
F = 62.4 N
Answer:
it takes our Moon about 29.5 days to complete one cycle of phases (from new Moon to new Moon).
The answer is C. Neutron star.
Answer:
Can behave both as a particle and wave
Explanation:
Electromagnetic wave has the electric and magnetic wave propagating/oscillating together. Electromagnetic waves such as x Ray, gamma ray, radio waves are important in health care and modern information technology .
Electromagnetic waves have particles such as the electrons and protons. They are responsible for the existence of electromagnetic waves by the charged particles vibrating. Electromagnetic waves behave as waves majority of the time. Electromagnetic energy is released in distinct packs of energy called photons which are particles but acts like waves.
The formula for speed is distance divided by time.
Your answer is 81.6 km per hour.