In the absence of air resistance, a projectile launched at the ...

[torybrooks]

In the absence of air resistance, a projectile launched at the same speed at any angle will attain the greatest range when projected at
 
  1) 30.
  2) 45.
  3) 60.
  4) 90.
 
  In the case of throwing a heavy spear, not at the same speed but with the same force, the greatest range is attained more likely when thrown at
  5) 30.
  6) 45.
  7) 60.
  8) 90.

Question 2

The Moon does not fall to Earth because
 
  1) the net force on it is zero.
  2) it is being pulled by the sun and planets as well as Earth.
  3) it is beyond the main pull of Earth's gravity.
  4) but it does fall
 
  More specifically, the Moon
  5) is subject to both centripetal and centrifugal forces.
  6) interacts with all massive bodies, both near and far.
  7) is free of air resistance as well as other Earthly influences.
  8) continually falls around Earth rather than straight into it.

[ghepp]

Answer to Question 1

Answer: 2, 5

Answer to Question 2

Answer: 4, 8

[torybrooks]

Thanks

[ghepp]

Welcome