Projectile Motion: 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?
A. 35°
B. 42°
C. 48°
D. 40°
E. 65°
Answer: C
You might also like to view...
Two masses are connected by a string which passes over pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a 30.0 degrees frictionless incline. The vertically hanging mass is 4.00 kg and the mass on the incline is 6.00 kg. The acceleration of the 4.00 kg mass is
A. 2.98 
B. 3.92
C. 5.75
D. 6.86
E. 7.84
Which of the following particles has not been observed experimentally?
a. antiproton c. photon b. graviton d. Z0 boson
A particle is acted upon by only two forces, one conservative and one nonconservative and neither being a force of friction, as it moves from point A to point B. The kinetic energies of the particle at points A and B are equal if
a. the sum of the works of the two forces is zero. b. the work of the conservative force is equal to the work of the nonconservative force. c. the work of the conservative force is zero. d. the work of the nonconservative force is zero. e. None of the above.
The loss of oxygen or gain of electrons by an atom or ion is called ______________
Fill in the blank(s) with correct word