A sled weighs 160 N. It is held in place on a frictionless 25.0° slope by a rope attached to a stake at the top; the rope is parallel to the slope. What is the normal force of the slope acting on the sled?
a. 145 N
b. 67.6 N
c. 177 N
d. 379 N
e. 74.6 N
a
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A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
a. y = ?0.10 sin 9.9t b. y = 0.10 cos 9.9t c. y = ?0.10 cos (9.9t + .1) d. y = 0.10 sin (9.9t + 5) e. y = ?0.05 cos 9.9t
Which of the following are the jovian planets?
A. Jupiter, Saturn, Uranus, Neptune B. Mercury, Jupiter, and Saturn C. Uranus, Neptune, and Pluto D. Mercury, Venus, Earth, Mars E. Earth, Mars, Jupiter, Saturn
Just as in hydraulic circuits there is water pressure, in electric circuits there is
A) current. B) voltage. C) resistance.
What do long period comets tell us about the structure of the Oort Cloud?
What will be an ideal response?