A 1.8-kg block is projected up a rough 10° inclined plane. As the block slides up the incline, its acceleration is 3.8 m/s2 down the incline. What is the magnitude of the force of friction acting on the block?
a. 5.0 N
b. 3.8 N
c. 4.2 N
d. 4.6 N
e. 6.5 N
b
Physics & Space Science
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A 7.8-kg solid sphere, made of metal whose density is 2500 kg/m3, is suspended by a cord. When the sphere is immersed in water (of density 1000 kg/m3 ), what is the tension in the cord?
A) 46 N B) 61 N C) 76 N D) 92 N E) 110 N
Physics & Space Science
How did the geocentric model and the heliocentric model of the universe explain retrograde motion?
What will be an ideal response?
Physics & Space Science
A G2 I star is ____________________ in diameter and ____________________ luminous than the Sun
Fill in the blank(s) with correct word
Physics & Space Science
How does the escape speed from Mars compare with that of the Earth? [ MEarth=9.31? MMars ; REarth=1.88 ? RMars ]
A) 222.% B) 22.5% C) 44.9% D) 66.2% E) 20.2%
Physics & Space Science