If F = 8.0 N and M = 1.0 kg, what is the tension in the connecting string? The pulley and all surfaces are frictionless
?
?
a.
4.1 N
b.
3.5 N
c.
3.8 N
d.
3.1 N
e.
4.8 N
c
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A 20.0 kg box slides down a 12.0 m long incline at an angle of 30.0 degrees with the horizontal. A force of 50.0 N is applied to the box in the upward direction to try to pull it up the incline. The applied force makes an angle of 10.0 degrees to the incline. If the incline has a coefficient of kinetic friction of 0.00, then the increase in the kinetic energy of the box is
A. 420 J. B. 475 J. C. 521 J. D. 585 J. E. 620 J.
What is the angular speed about the rotational axis of the Earth for a person standing on the surface?
a. 7.3 × 10^?5 rad/s b. 3.6 × 10^?5 rad/s c. 6.3 × 10^?5 rad/s d. 3.1 × 10^?5 rad/s
Pluto was discovered in
A) ancient times. B) 1789. C) 1859. D) 1930. E) 1992.
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase, and a fringe pattern is observed on a screen 4.8 m from the slits
If there are 5.0 complete bright fringes per centimeter on the screen near the center of the pattern, what is the wavelength of the monochromatic light? A) 700 nm B) 650 nm C) 550 nm D) 600 nm E) 750 nm