A conical pendulum is formed by attaching a ball of mass m to a string of length L then allowing the ball to move in a horizontal circle of radius r. The string traces out the surface of a cone. A. Find an expression for the tension T in the string.

B. Find an expression for the ball's angular speed w.

I am more interested in how to get the the answer.

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?