Question 2 (6 points) A ball is thrown upward at 4 meters per second starting from ground level. How long does it take for the ball to return to the ground? Return to page 3 Return to page 2 Question 3 (1 point) Since the projectile moves vertically and horizontally at the same time, the trajectory of a projectile is a '- No answer provided a. parabola b. straight line C. CU rve Return to page 4 Question 4 (1 point) The horizontal component of a projectile's motion is uniform. L No answer provided True False Question 7 (1 point) A stone is thrown horizontally at 7.50 m/s from a cliff that is 68.4 m high. How far from the base of the cliff does the stone land? L No answer provided a. 19.8 m b. 3.74 m c. 28.1 m Return to page 8 Question 8 (1 point) The vertical component ofa projectile's motion is constant. '_, No answer provided True False Return to page 11 Question 11 (6 points) A ball is dropped from 4 meters above the ground. If it begins at rest, how long does it take to hit the ground? Return to page 12 Question 12 (1 point) A projectile is moving uniformly in the horizontal direction and accelerating in the vertical direction. L No answer provided True False Return to page 14 lfa ball that is 4 meters above the ground is thrown horizontally at 4 meters per second, how long will it take for the ball to hit the ground? Question 14 (4 points) Return to page 15 Question 15 (1 point) Action-reaction forces always involve four forces acting on four separate objects. 'd No answer provided True False Return to page 16 A is an object that is launched by some means, and after it is launched, it continues to move because of its own inertia. Question 16(1 point) L No answer provided a. missile b. projectile c. rocket Return to page 17 Question 17 (1 point) A leaf falls to the ground because gravity pulls down on the leaf. 'd No answer provided True False