A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 17° with the horizontal. The rope moves paral

You are watching: Which of the following are not vector directions?


(a) 950J

(b) 216 W

(c) 316.67 W


(a) If the skier is moving at a constant speed, then his kinetic energy is unchanged. The work done by the rope is the same for speed at 2.2m/s as it is for 1.5m/s. It is 950J

(b) When the speed is 1.5m/s then the time it would take to move up a distance of 6.6 m is 6.6 / 1.5 = 4.4 s

If the work is 950J over 4.4s then the rate of work is 950 / 4.4 = 216 W

(c) When the speed is 2.2 m/s then the time it would take to move up a distance of 6.6 m is 6.6 / 2.2 = 3 s. If the work is 950J over 3s then the rate of work is 950 / 3 = 316.67 W

7 0
8 months ago
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When a charged particle moves at an angle of 26.1 with respect to a magnetic field, it experiences a magnetic force of magnitude
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The angle is 153.9 degree.


Let the magnetic field is B and the charge is q. Angle = 26.1 degree

The force is F.

Let the angle is A".

Now equate the magnetic forces


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Red light from three separate sources passes through a diffraction grating with 6.60×105 slits/m. The wavelengths of the three l
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