KHAN ACADEMY An airplane flies with constant velocity.
Which claim about the forces acting on the airplane must be true?
Choose 1 answer
A) There are no forces on the airplane.
B) There is no net force on the airplane.
C) There is a net force on the airplane.
D) There is not enough information.

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader