Answer:
0.47 N
Explanation:
Here we have a ball in motion along a circular track.
For an object in circular motion, there is a force that "pulls" the object towards the centre of the circle, and this force is responsible for keeping the object in circular motion.
This force is called centripetal force, and its magnitude is given by:

where
m is the mass of the object
is the angular velocity
r is the radius of the circle
For the ball in this problem we have:
m = 40 g = 0.04 kg is the mass of the ball
is the angular velocity
r = 30 cm = 0.30 m is the radius of the circle
Substituting, we find the force:

Resultant force= (2*6^2)^(1/2)
=8.5m/s
answer is B.
Answer:

Explanation:
Not considering any type of losses in the transformer, the input power in the primary is equal to the output power in the secondary:

So:

Where:

Solving for 

Replacing the data provided:

.73 because velocity is determined by distance divide by speed brainliest if this helps