Physics, 23.08.2019 18:00 dondre54

Suzy stands on the talahatchee bridge kicking stones into the water below. if she kicks a stone with a horizontal velocity of 3.50 m/s, and it lands in the water a horizontal distance if 5.40 m from where she is standing, how high is the bridge. can you me thus us 2-d motion

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Yep. I think I can.

Horizontal motion doesn't speed up or slow down.

      distance   = (speed) x (time)

      5.4 m    = (3.5 m/s) x (time)
Divide each side
by 3.5 m/s: (5.4 m) / (3.5 m/s) =    time

   time = 1.543 seconds (rounded) .

That's how much time the stone took to fall from the bridge to the water.

Now we can go on to the vertical distance:
Do you remember this physics formula for falling distance ?

Distance = (1/2) (gravity) (time)²

   Distance = (1/2) (9.8 m/s²) (1.543 sec)²

   = (4.9 m/s²)    x    (2.38 sec²)

   = 11.7 meters .

Answer from: Quest

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:

Answer from: Quest

hypothesising or postulating

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Suzy stands on the talahatchee bridge kicking stones into the water below. if she kicks a stone with...