Atoy train is pushed forward and released at xi = 4.0 m with a speed of 2.5 m/s. it rolls at a steady speed for 2.0 s, then one wheel begins to stick. the train comes to a stop 7.7 m from the point at which it was released.
what is the train's acceleration after its wheel begins to stick?

Explanation:

Given

Initial speed u = 2.5 m/s

Final speed v = 0

Distance traveled S = 7.7 m

Duration t = 2.0 s

Solution

Distance traveled before the wheel got stuck

Distance traveled after wheel got stuck

Acceleration

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:

the inner core.

good luck: )

klicker