A35 kg crate undergoes a horizontal acceleration of 1.5 m/s^2 on a level surface when pulled by a 65.0 n force. what is the coefficient of kinetic friction between the crate and the surface?

μ = 0.036

Explanation:

m = 35 kg

a = 1.5 m/s^2

Force applied, F = 65 N

Let f be the friction force.

net force = F - f

According to Newton's second law

F - f = m x a

65 - f = 35 x 1.5

65 - f = 52.5

f = 65 - 52.5 = 12.5 N

Now by the law of friction

f = μ m g

where, μ is the coefficient of friction

12.5 = μ x 35 x 9.8

μ = 0.036

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:

ι вєℓιєνє ιт ιѕ тнє fιяѕт ¢нσι¢є(α.)

нє ѕнσυℓ∂ ѕмιℓє ρσℓιтℓу αи∂ ѕρєαк тσ тнє ρєяѕσи ωнσ ιѕ ιитєяяυριиg αfтєя тнє ∂ιѕ¢υѕѕισи

нσρє ι ¢συℓ∂ нєℓρ.