Answer:
a. 1.5rad/s
b. 0.40J
Explanation:
a. Angular acceleration is obtained by determining the gradient of the straight line.
-The graph perfectly cuts two points[4,4], [2,1]:
#The line's gradient is 1.5
Hence, the rod's angular acceleration is 1.5rad/s
b. Let at t=0, the angular velocity be and at .
#Rotational kinetic energy is determined using the formula:
#Equate the expression to the energy value given:
Hence, the kinetic energy at t=o is 0.40J
here two forces are acting at different angles and we need to find its resultant
forces are given as
@125 degree
@200 degree
now in order to find its resultant we will find its components
here it is given as
Now net force in x and y direction is given as
so net force is given as
now the magnitude is given as
angle of the force is given as
so net resultant force is 917.13 N at 163.4 degree
D.as a magnet is being thrust through the coil
You draw a straight line from the start point to the end point. It doesn't matter what route was actually followed for the trip.