Answer:
I believe 0
Explanation:
this is due to the fact that the box will not move anywhere the forces are canceling themselves out.
Answer:
4. atmosphere and geosphere
5. atmosphere and hydrosphere
6. hydrosphere and geosphere (? not sure about this one sorry)
7. hydrosphere and geosphere
8. biosphere and geosphere
Answer:
259.2 Joule
Explanation:
Spring constant, K = 360 N/m
mass, m = 20 kg
Amplitude, A = 1.2 m
According to the equilibrium of force
The mechanical energy lost is given by
U = 0.5 KA²
U = 0.5 x 360 x 1.2 x 1.2
U = 259.2 Joule
The relationship between the impulse and the momentum allows to find the result for the question about the contact time is:
-
The contact time on the floor is t = 0.60 s
The impulse is the push force on a body and is related to the variation of the amount of momentum.
I = ∫ F. dt = Δp
p = mv
where I is the momentum, F the force, t the time, p the amount of momentum and m the mass .
They indicate the average force F = 330 N, the jump height is y = 12.0 cm = 0.120 m.
F. t = m v_f - m v₀
Let's search with kinematics for the initial speed of the jump.
v² = v₀² - 2 g y
At the highest point the velocity is zero.
0 = v₀² - 2ay
Let's calculate.
v₀ = 1.53 m / s
Suppose that the jumps are elastic, that is, that the speed with which it reaches the ground is equal to the speed with which it leaves, but in the opposite direction.
Let's calculate.
t = 0.60 s
In conclusion using the relationship between impulse and momentum we can find the result for the question about the contact time is:
The contact time on the floor is t = 0.60 s
Learn more about impulse here: brainly.com/question/904448
Yes but they not supposed to