An electrostatic paint sprayer has a 0.200-m-diameter metal sphere at a potential of 25.0 kV that repels paint droplets onto a g
rounded object. (a) What charge is on the sphere? (b) What charge must a 0.100-mg drop of paint have to arrive at the object with a speed of 10.0 m/s?
1 answer:
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Answer:
The force is
Explanation:
From the question we are told that
The mass of the block is
The coefficient of static friction is
The coefficient of kinetic friction is
The normal force acting on the block is
substituting values
Given that the force we are to find is the force required to get the block to start moving then the force acting against this force is the static frictional force which is mathematically evaluated as
substituting values
Now for this block to move the force require is equal to i.e
=>
Answer:
Explanation:
The gravitational potential energy gets transformed into translational and rotational kinetic energy, so we can write . Since
(the ball rolls without slipping) and for a solid sphere
, we have:
So our translational speed will be: