A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 12° with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 900 J of work on the skier as the skier moves a distance of 8.0 m up the incline.

(a) If the rope moved with a constant speed of 2.0 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 8.0 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) 1.0 m/s and
(c) 2.0 m/s?


Answer:

Physics & Space Science

You might also like to view...

The size of the smallest detail a microscope can resolve is

A. 1/1000 the wavelength of the light used B. Half the wavelength of the light used C. 10 times the wavelength of the light used D. Infinitely small.

Physics & Space Science

At an instant when a particle of mass 50 g has an acceleration of 80 m/s2 in the positive x direction, a 75-g particle has an acceleration of 40 m/s2 in the positive y direction. What is the magnitude of the acceleration of the center of mass of this two-particle system at this instant?

A. 60 m/s2 B. 56 m/s2 C. 40 m/s2 D. 50 m/s2 E. 46 m/s2

Physics & Space Science

A proton (mass = 1.67 × 10^-27 kg, charge = 1.60 × 10^-19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB - VA

a. +15 V b. -15 V c. -33 V d. +33 V e. -20 V

Physics & Space Science

When an electron moves from the n = 1 to the n = 3 orbit:

a. the radius doubles and the angular momentum increases by a factor of 9. b. the radius increases by a factor of 9, and the angular momentum triples. c. both the radius and the angular momentum increase by a factor of 9. d. both the radius and the angular momentum triple.

Physics & Space Science