A skater has outstretched arms preparing for a turn with a moment of inertia of 2.56 kg m2

. When the arms are joined the body moment of inertia around the axis of

rotation is equal to 0.40 kg m2

. If the original angular speed of the skater is 0.40 rev/s, what is

the final angular speed?

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?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

This is one type of line graph in which the independent variable is time plotted on the x axis and the dependent variable, also numerical, is plotted on the y axis.