Answer:
a)V= - 1.11 m/s
b)V= 0.833 m/s
Explanation:
Given that
M (Mass of lumberjack)= 98 kg
Final velocity of lumberjack ,V₁= 3.3 m/s
m (Mass of log) = 290 kg
a)
There is no any external force that is why linear momentum will be conserved
Pi=Pf
initially both are at rest so Pi=0 ( P = m v)
Lets take speed of log is V
0= M V₁ + m V
V = - M V₁ / m
V= - 98 x 3.3 / 290
V= - 1.11 m/s
b)
Now again from linear momentum conservation
(m + M )V =M V₁
V= M V₁(m+M)
By putting the values
V= 98 x 3.3/ (98 + 290 )
V= 0.833 m/s
Answer:
F/2
Explanation:
In the first case, the two charges are Q1 and Q2 and the distance between them is r. K is the Coulomb's constant
Hence;
F= KQ1Q2/r^2 ------(1)
Where the charge on Q1 is doubled and the distance separating the charges is also doubled;
F= K2Q1 Q2/(2r)^2
F2= 2KQ1Q2/4r^2 ----(2)
F2= F/2
Comparing (1) and (2)
The magnitude of force acting on each of the two particles is;
F= F/2
Answer:
Explanation:
Two straight wires
Have current in opposite direction
i1=i2=i=2Amps
Distance between two wires
r=5mm=0.005m
Length of one wire is ∞
Length of second wire is 0.3m
Force between the wire,
The force between two parallel currents I1 and I2, separated by a distance r, has a magnitude per unit length given by
F/l = μoi1i2/2πr
F/l=μoi²/2πr
μo=4π×10^-7 H/m
The force is attractive if the currents are in the same direction, repulsive if they are in opposite directions.
F/l = μoi1i2/2πr
F/0.3=4π×10^-7×2²/2π•0.005
F/0.3=1.6×10^-4
Cross multiply
F=1.6×10^-4×0.3
F=4.8×10^-5N
Try to repost so somebody answer
Answer: anlien, enemy gnome, spaceship
Explanation:
