You push downward on a trunk at an angle 25° below the horizontal with a force of If the trunk is on a flat surface and the coefficient of static friction between the surface and the trunk is 0.61,
what is the most massive trunk you will be able to move?
A) 81 kg
B) 93 kg
C) 73 kg
D) 112 kg
A
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The equator receives the same amount of sunlight from season to season
a. True b. False Indicate whether the statement is true or false
If an elephant grows proportionally to twice its height, the area of its ears would be about
A) twice. B) four times more. C) six times more. D) eight times more. E) none of the above
A 340-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 300-g cart. What is the speed of the 300-g cart just after the collision?
A) 0.0781 m/s B) 1.33 m/s C) 0.625 m/s D) 1.25 m/s E) 0.664 m/s
Two extremely flat glass plates, 10.0 cm wide, touch at one end but are separated by a thin wire at the other end, forming a wedge
Light with a wavelength of 450 nm shines almost perpendicularly on the glass and forms fringes which are 1.80 mm apart. What is the diameter of the wire? A) 25.0 µm B) 10.0 µm C) 20.0 µm D) 12.5 µm E) 17.5 µm