Answer:
Work done, W = 19.6 J
Explanation:
It is given that,
Mass of the block, m = 5 kg
Speed of the block, v = 10 m/s
The coefficient of kinetic friction between the block and the rough section is 0.2
Distance covered by the block, d = 2 m
As the block passes through the rough part, some of the energy gets lost and this energy is equal to the work done by the kinetic energy.
W = 19.6 J
So, the change in the kinetic energy of the block as it passes through the rough section is 19.6 J. Hence, this is the required solution.
Answer:
F = 0.332 N in the east direction
Explanation:
Length, L = 7.7 cm = 7.7 * 0.01 = 0.077 m(along the north south)
Current, I = 3.45 A (northwards)
Magnetic field, B = 1.25 T (vertically upwards)
The magnitude of the force is given by, F = ILBsin90
F = 3.45 * 0.077 * 1.25 * 1
F = 0.332 N
The direction of the force is calculated using the Right Hand Thumb Rule:
It states that "Hold the wire carrying current in your right hand so that the thumb points along the wire in the direction of the current, then the fingers will encircle the wire in the direction of the lines of magnetic force."
Based on the Right Hand Thumb Rule, the magnetic force will act in the east direction
Answer:
w1 = 4.04 / √r
Explanation:
This exercise should be done using Newton's second law, where the centripetal month acceleration, write the equation for the vertical axis and the radius of rotation
Y Axis
fr - W = 0
fr = W
X axis (radial)
N = m 
The equation for the force of friction is
fr = μ N
Let's replace
μ (m
) = mg
Centripetal acceleration is
= v² / r
v = wr
= w² r
μ w² r = g
w = √(g/μ r)
In order for the trip to be safe, people must not move, so the friction must be static, let's calculate the angular velocity for the extreme values of the friction increase
μ = 0.60
w1 = √ (9.8 / 0.6 r)
w1 = 4.04 / √r
μ = 1.0
w2 = √ (9.8 / 1 r)
w2 = 3.13 / √r
To finish the calculation you need the radius of the cylinder, but for the same radius the safe speed is w1
110 grams
mass of salt + mass of water
10 + 100
110g
<span>The majority of the asteroids in our solar system are found
in the space between the orbits of Mars and Jupiter. (B)</span>
