17. Challenge A 1,500-kg car doubles its speed from 50 km/h to 100 km/h. By how
many times does the kinetic energy from the car's forward motion increase?
116 Chapter 4• Work and Energy

Which type of microscope would allow the viewer to see ribosomes inside a cell?

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

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?