A horizontal force of 310 N is exerted on a 2.0-kg ball as it rotates (at arm’s length) uniformly in a horizontal circle of radius 0.90 m. Calculate the speed of the ball

The velocity is

Explanation:

From the question we are told that

   The horizontal force is

    The mass of the ball is

   The radius of the circle is  

Generally the centripetal force acting on the ball is mathematically represented as

Making v the subject

Generally the centripetal force is equivalent to the horizontal force exerted so

=>    

=>    

would be false hope this out

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards