A 100-N force has a horizontal component of 80 N and a vertical component of 60 N. The force is applied to a cart on a level frictionless floor. The cart starts from rest and moves 2.0 m horizontally along the floor due to this force
What is the cart's final kinetic energy?
A) 160 J B) zero C) 120 J D) 200 J
A
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How much work must be done by frictional forces in slowing a 1000-kg car from 26m/s to rest?
A) 3.41 × 105 J B) 2.73 × 105 J C) 4.09 × 105 J D) 4.77 × 105 J
If an object is located 20 m to the right of the origin at 1:00 PM, and later the object is located 30 m to the right of the origin at 2:00 PM, then the displacement from 1:00 PM to 2:00 PM is
A. 50 m to the right. B. 30 m to the right. C. 25 m to the right. D. 20 m to the right. E. 10 m to the right.
At which planet can the pole remain in darkness for 42 years, then have 42 years of constant daylight?
A) Pluto B) Neptune C) Uranus D) Jupiter E) Saturn
What is dispersion?
a. The reflection of colors off the surface of a bright-colored translucent object, like a jewel. b. The refraction of light as it passes from air into water. c. The separation of colors of light because their waves superpose. d. The separation of light into different colors because of how different colors of light refract differently. e. The combination of a spectrum of colored lights into white light.