A mechanical wave is a wave where there's
some material doing the waving.
Examples:
-- ripples on water
-- waves on a rope
-- waves on a spring
-- waves on a Slinky
-- sound waves in air
-- seismic waves in rock
-- vibrations on a guitar string
-- vibrations on a violin string
Answer:
E = 12262 V/m
Explanation:
given,
Charge of the particle, q = +4.0 μC
mass of the ball, m = 5 g
Electric field, E = ?
Force due to weight
F = m g
Force due to electric field
F =q E
To balance the weight of particle both the forces must be equal
Electric field exerted on the ball will be equal to
m g = q E


E = 12262 V/m
Hence, the electric field acting in the particle is equal to E = 12262 V/m
Answer:
The hoop
Explanation:
We need to define the moment of inertia of the different objects, that is,
DISK:

HOOP:

SOLID SPHERE:

HOLLOW SPHERE

If we have the same acceleration for a Torque applied, then


The greatest momement of inertia is for the hoop, therefore will require the largest torque to give the same acceleration
Answer:
5.5 N at 50.8° north of west.
Explanation:
To find the resultant of these forces, we have to resolve each force along the x- and y-direction, then find the components of the resultant force, and then calculate the resultant force.
The three forces are:
(east)
(west)
(at 60° north of west)
Taking east as positive x-direction and north as positive y-direction, the components of the forces along the 2 directions are:



Threfore, the components of the resultant force are:

Therefore, the magnitude of the resultant force is

And the direction is:

And since the x-component is negative, it means that this angle is measured as north of west.