Answer:
what's the question exactly because what you said was true but what's the question
Answer:
Momentum of car = 1200 kg * 10 m/s = 12000 kgm/s Momentum = Force * time 12000 kgm/s = Force * 20s Force = 600 N
Explanation:
Answer:
Exposing objects to beams of radiation is called irradiation
Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
Answer:
a) w₂ = 22.6 rad / s
, b) / K₀ = 3
Explanation:
a) This exercise we must define the system as formed by the platform, the man and bricks, for this system as a whole the forces are internal the angular momentum is conserved, let's write in two instants
Initial. Greater moment of inertia
L₀ = I₁ w₁
Final. Less moment of inertia
= I₂ w₂
L₀ =
I₁ w₁ = I₂ w₂
w₂ = I₁ / I₂ w₁
We reduce to the SI system
w₁ = 1.2 rev / s (2π rad / 1 rev) = 7.54 rad / s
w₂ = 6.0 / 2.0 7.54
w₂ = 22.6 rad / s
b) Let's look for kinetic energy in both moments
Initial
K₀ = ½ I₁ w₁²
K₀ = ½ 6.0 7.54²
K₀ = 170.55 J
Final
= ½ I₂ w₂²
= ½ 2.0 22.6²
= 510.76 J
We look for the relationship
/ K₀ = 510.76 / 170.55
/ K₀ = 3
c) The change in angular momentum is what creates the change in kinetic energy, of course the total mechanical energy is conserved as the potential energy decreases