Answer:
3.65 x mass
Explanation:
Given parameters:
Time = 20s
Initial velocity = 0m/s
Final velocity = 73m/s
Unknown:
Force the ball experience = ?
Solution:
To solve this problem, we apply the equation from newton's second law of motion:
F = m
m is the mass
v is the final velocity
u is the initial velocity
t is the time taken
So;
F = m ( ) = 3.65 x mass
Answer:
critical angle is the angle of incidence in optically denser medium, for which the angle of reflection in the less denser medium is 90 degree
Explanation:
total internal reflection occurs at one particular angle of incidence where the reflected ray lies on the boundary.
this angle is called the critical angle
Answer:
The box should be placed at a distance of from the pivot
Explanation:
In order to be in static equilibrium, both Torques have to be the same magnitude, so:
Replacing the formula for Torque:
where X is the distance we need to find.
Solving for X we get:
As we can see, the distance does not depend on the actual value of the mass but on the fact of one being twice as much as the other one.