A 50-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 30.0° below the horizontal is applied to the box. The coefficient of static friction between the box and the surface is 0
40, and the coefficient of kinetic friction is 0.30. What is the force of friction on the box? A) 32 N
B) 200 N
C) 220 N
D) 250 N
E) 620 N
C
You might also like to view...
How could you test the hypothesis that the acceleration of gravity does not depend on mass? (Ignore effects of air resistance.)
A) Drop two objects with the same mass from the same height. B) Drop two objects with the same mass from different heights. C) Drop two objects with different masses from the same height. D) Drop two objects with different masses from different heights.
What is main-sequence fitting?
A) a way of forcing stars to fit into a standard main sequence, even when they have some unusual characteristics B) a method for determining the age of a star cluster C) a method for determining the distance to a star cluster by assuming that its main sequence should line up with the main sequence on a standard H-R diagram D) the way we construct an H-R diagram by plotting the surface temperatures and luminosities of stars
If C1 = 30 µF, C2 = 25 µF, C3 = 15 µF, and ?V0 = 24 V, determine the energy stored by C2
a.
2.3 mJ
b.
4.8 mJ
c.
3.6 mJ
d.
1.3 mJ
e.
3.2 mJ
Mass can be considered concentrated at the center of mass for rotational motion
Indicate whether the statement is true or false