A child throws a ball with an initial speed of 8.0 m/s at an angle of 40° above the horizontal. The ball leaves her hand 1.0 m above the ground. At what angle below the horizontal does the ball approach the ground assuming no effects of air?
A) 35°
B) 42°
C) 48°
D) 40°
E) 65°
C
You might also like to view...
If the plate area, plate separation, dielectric strength, and dielectric constant all are doubled for a parallel plate capacitor, what happens to the maximum voltage for this capacitor?
A. it stays the same B. it doubles C. it quadruples D. it halves E. it quarters
A model rocket flies upward at constant acceleration, and undergoes a displacement of 15.0 m during its first 0.25 s of travel. What was its speed at the end of the first 0.25 s?
A. 30 m/s B. 60 m/s C. 11 m/s D. 120 m/s
What causes Mercury's 3:2 spin-orbit resonance?
A) the planet's closeness to the Sun B) the planet's very eccentric orbit C) the planet's high density D) tidal torques operating on the planet E) All of the above are factors.
Which of the following is not considered a potential solution to the question of why we lack any evidence of a galactic civilization?
A) The galactic civilization is deliberately avoiding contact with us. B) There is no galactic civilization because we are the first species ever to achieve the ability to study the universe. C) There is no galactic civilization because all civilizations destroy themselves before they achieve the ability to colonize the galaxy. D) The galactic civilization probably is undetectable because they operate under different laws of physics from the ones we know.