No. You have to lose a lot of momentum to slow down enough to survive the impact (obviously depending on the height of the building). In your scenario, you can only transfer that momentum to the chair, by pushing it downward with your legs.
Let's say you jump off a 10 metre tall building and have a mass of 75 kg. You will be travelling at about 14 m/s just before impact, with a momentum of 1050 kgm/s. You want to reduce that momentum to around 750 kgm/s (equivalent to falling from a height of 5 m, which is probably survivable and may leave you able to walk away), so you have to transfer 300 kgm/s of momentum to the chair just by pushing it with your legs. For a 10 kg chair that means accelerating it to 30 m/s (in addition to the 14 m/s velocity the chair and you are already falling at), which is rather difficult.
You'd probably be better off landing on the chair and hoping that the chair breaking absorbs enough of the impact.
Answer:
v1 = v2
Explanation:
Given:
- The missing figure is (attached).
- The Magnetic Field B1 > B2
Find:
How does the speed v1 of the electron in region 1 compare with the speed v2 in region 2?
Solution:
- From Lorentz Law we know that the Force that acts on the charge particle is the cross product of Magnetic Field Vector ( B1 or B2 ) and the velocity vector (v1 or v1).
- From the attached figure related to this problem we see that the electron velocity or direction of motion is always parallel to the magnetic field B1&B2.
- The law of cross product for parallel vector is 0. Hence, the Lorentz force acting on the electron is also zero.
- Zero Force means no work is done on the particle by the magnetic field, thus, the change in kinetic energy also zero for conservation of energy to hold.
- The initial and final kinetic energies of the electron is same. Hence, we can conclude that v1 = v2.
Intensity = power/ Area
⇒ Power absorbed = 1× A ⇒ 1.4 × 10∧3 ×(10)
= 14000 Watt = 14 kWatt
time - averaged intensity divided by speed of light in free space is the radiation pressure
P = (1.4 × 1000)/c
Force = pressure × area ⇒ ((1.4× 1000)/(10∧8)) × 10
= 0.00004666666N
0.000047N
ANSWER:
1573.5 g
STEP-BY-STEP EXPLANATION:
Given:
Volume (V) = 150 cm³
We have that the density of silver is 10.49 g/cm³, therefore, we calculate its mass, as follows:
The mass of silver is 1573.5 grams
Answer:
Explanation:
As we know that charge on the plates of capacitor is changing at rate given as
now this rate of charging the plates will give the displacement current in the region between the plates
Now by Ampere's law we can say
now we have