G A child pulls a friend in a little red wagon with constant speed. If the child pulls with a force of 17.0 N for 14.0 m, and the handle of the wagon is inclined at an angle of 22° above the horizontal, how much work does the child do on the wagon?

220.67 J.

Explanation:

Work: This can be defined as the product of force and its horizontal distance along the direction of force. The S.I unit of work is Joules (J).

The expression for work done is given as,

W = F×dcosФ Equation 1

Where W = work done by the child, F = Force, d = distance, Ф = angle to the horizontal

Given: F = 17 N, d = 14 m, Ф = 22°

Substitute into equation 1

W = 17(14)cos22°

W = 220.67 J.

Hence the child does a work of 220.67 J on the wagon

we need answer choices

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: