A 2.0-kg block slides on a frictionless 15° inclined plane. A force acting parallel to the incline is applied to the block. The acceleration of the block is 1.5 m/s2 down the incline. What is the applied force?
a. 8.1 N down the incline
b. 3.0 N down the incline
c. 2.1 N up the incline
d. 3.0 N up the incline
e. 8.1 N up the incline
C
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A 4.00 kg ball is moving at 4.0 m/s to the right and a 6.00 kg ball is moving at 3.00 m/s to the left. The total momentum of the system is
A. 16 kg m/s to the right. B. 2.0 kg m/s to the right. C. 2.0 kg m/s to the left. D. 18 kg m/s to the left. E. 34 kg m/s to the left.
An aggregate of two or more minerals is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following discoveries was NOT made by Voyager 1 or 2?
A) Jupiter has an encircling ring. B) Jupiter's magnetosphere extends beyond the orbit of Saturn. C) Jupiter has cloud bands in its upper atmosphere. D) Jupiter's moons are as varied as the surfaces of the terrestrial planets. E) Jupiter's Great Red Spot is characterized by swirling patterns much like a hurricane.
A particle (charge = Q) is kept in a fixed position at point P, and a second particle (charge = q) is released from rest when it is a distance R from P. If Q = +2.0 mC, q = ?1.5 mC, and R = 30 cm, what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?
a. 60 kJ b. 45 kJ c. 75 kJ d. 90 kJ e. 230 kJ