I think it is B, but I am not sure!
Answer:
The human arm is a class 3 lever
Explanation:
The total centripetal force is 50N
Given
mass of the ball= 1kg
speed of the ball = 10m/s
Radius = 2m
we know that
centripetal force = F =
F =
= 50 N
<h3>
What is Centripetal force?</h3>
- A force that causes a body to follow a curved path is known as a centripetal force.
- It always moves in a direction that is the opposite of the body's velocity and in the direction of the immediate center of curvature of the path. It is "a force by which bodies are dragged or driven, or in any other way gravitate, towards a point as to a center," according to Isaac Newton.
- Gravity is the centripetal force that drives astronomical orbits according to Newtonian mechanics.
To learn more about centripetal force with the given link
brainly.com/question/11324711
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Question:
a 1 kg ball is confined to move on a. vertical circle of a radius of 2 meters. There is no friction between the bead and the circular track. The bead has a speed of 10 m/s when at the top of the circle at point A, find the total centripetal force.
Answer:
The velocity of astronaut will be 0.105 m/s in opposite direction of the tool.
Explanation:
Given that,
Mass of the Astronaut, m = 68.5 kg
Mass of the the tool, m' = 2.25 kg
Speed of tool, v' = -3.2 m/s (direction is sway from space station)
It is required to find the speed of the astronaut. The momentum will remain conserved. So,

v is the speed if Astronaut

So, the velocity of astronaut will be 0.105 m/s in opposite direction of the tool.
Magnetic domains are which of the following?