A golf ball is struck with a five iron on level ground. It lands 92.2 m away 4.30 s later. What were (a) the direction and (b) the magnitude of the initial velocity

Vi = 29.83 m/s,   θ = 54.7⁰

Explanation:

Given:

Horizontal Distance x= 92.2 m

Time t = 4.30s s

To find Initial Velocity Vi =?

we have x = V t

Vix= Horizontal Component and Viy is vertical Component

Vix = x / t = 92.2 m / 4.30 s = 21.11 m/s

from 2nd Eqn of motion

y = Viy t + 1/2 g t²    

0 = Viy × 4.3 + 0.5 × (-9.81) m/s² × (4.3)²

we get Vy = 21.09 m/s

Vi = Square root ( Vix ² + Viy²)

Vi = 29.83 m/s

For Direction

Tan θ = Viy / vix

⇒  θ = Tan ⁻¹ ( 29.83  / 21.11 )

θ = 54.7⁰

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

your answer is c! hope this : )