While moving a 13 kg refrigerator, an upward force of 28 n is applied 52 degrees above the horizontal, so that it accelerates from rest at 1.2 m/s2. what is the frictional force between the refrigerator and the floor?

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?

In an experiment, how can i change human errors? be specific.

Place me with this question is my last question