Author Question: A foul ball is hit straight up into the air with a speed of 30 m/s, and air resistance is ... (Read 41 times)

Sufayan.ah · **on:** Jul 29, 2018

A foul ball is hit straight up into the air with a speed of 30 m/s, and air resistance is negligible. (a) Calculate the time required for the ball to rise to its maximum height.

(b) Calculate the maximum height reached by the ball above the point where it hit the bat. (c) Determine the times at which the ball passes a point 25 m above the point where it was hit by the bat. (d) Explain why there are two answers to part (c).

Question 2

For a long ideal solenoid having a circular cross-section, the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T,

where t is time in seconds. If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid, find the radius of the solenoid.
A) 0.94 m B) 9.0 m C) 0.30 m D) 77 m

huda · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

(a) 3.1 s (b) 46 m (c) 1.0 s and 5.1 s
(d) One value for the ball traveling upward; one value for the ball traveling downward.

Answer to Question 2

A