A 150-N sled is pulled up a 28° slope at a constant speed by a force of 120 N. What is the coefficient of kinetic friction between sled and slope?
a. 0.53
c. 0.37
b. 0.22
d. 0.33
C
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Velocity Selector: A singly-charged ion enters a velocity selector that has a 0.18-T magnetic field perpendicular to an electric field of 1.6 kV/m, with both fields perpendicular to the velocity of the ion. The same magnetic field is then used to deflect the ion into a circular path of radius 12.5 cm. (e = 1.60 × 10-19 C)(a) What velocity was selected by the velocity selector?(b) What was the mass of the ion?
What will be an ideal response?
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What will be an ideal response?
A hockey puck slides off the edge of a horizontal platform with an initial velocity of 20 m/s horizontally. The effects of air are negligible. The height of the platform above the ground is 2.0 m
What is the magnitude of the vertical component of the velocity of the puck just before it hits the ground? A) 20 m/s B) 6.3 m/s C) 13 m/s D) 15 m/s E) 21 m/s
The distance between two successive ‘like' points on a wave is the wave's wavelength
a. True b. False Indicate whether the statement is true or false