A child is walking eastward along a flat sidewalk. She is pulling a wagon behind her with pulling force F applied to the handle. The handle makes an angle of 40° with the horizontal. Rather than drawing a slanted arrow in the free-body diagram for the wagon, which two arrows could be substituted for F?

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Can anybody me with this? ? (picture included.)