Projectile Motion: A projectile is launched with an initial velocity of 80 m/s at 30° above the horizontal. Neglecting air resistance, what is horizontal component of the projectile's acceleration?
A. 80 m/s2
B. 40 m/s2
C. 9.8 m/s2
D. 0 m/s2
E. 69 m/s2
Answer: D
You might also like to view...
Compare the graph above to Figure 8.14, which shows the decay of potassium-40. Which element is more radioactive (undergoes radioactive decay more quickly)?
A) uranium-235 B) potassium-40 C) Both are equally radioactive.
Mars has a mass that is 1/10th the mass of the Earth and a radius that is 1/2 the radiusof Earth. Compare the force of gravity on Mar's surface to that on the surface of Earthusing the proportional relationship F is proportional toM/R2
a) Gravity on Mars is 10 times stronger than on Earth. b) Gravity on Mars is 1/10th as strong as on Earth. c) Gravity on Mars is 4/10ths as strong as on Earth. d) Gravity on Mars is 4 times stronger than on Earth. e) Gravity on Mars is equal to gravity on Earth.
A book rests on a level table top. Which force does Newton's third law imply is equal in magnitude but opposite in direction to the weight of the book?
A) the force of the table on the earth B) the force of the earth on the table C) the force of the book on the earth D) the force of the table on the book E) the force of the book on the table
The range of diameters and luminosities displayed by elliptical galaxies is ____
a. similar to the range of spirals, and smaller than spiral galaxies on average b. similar to the range of spirals, and about the same as spiral galaxies on average c. similar to the range of spirals, and larger than spiral galaxies on average d. wider than the range for spirals, extending to much larger sizes than spiral galaxies e. wider than the range for spirals, extending to much smaller sizes than spiral galaxies