A 0.45-kilogram football traveling at a speed of 22 meters per second is caught by an 84-kilogram stationary receiver. if the fo
1 answer:
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Answer:
Explanation:
Given
mass of object
kinetic Energy
Tension in string
mass is moving in a horizontal circle so tension is providing the centripetal acceleration
therefore
where r=radius of circle
kinetic energy of particle
divide 1 and 2 we get
Answer:
F - fr = ma , N - W = 0
Explanation:
In this exercise we are asked to identify the forces that act on the jack, for this we will use Newton's second law
On the x axis
We have two forces: the friction and the force of the girl who pulls the cat
F - fr = ma
On the y axis
There are two forces: normal and weight
N - W = 0
A diagram of these forces can be seen in the attachment
