A wave and a crest are travelling toward each other. The crest has an amplitude of
3 cm and the trough has an amplitude of 2
cm. What is the amplitude of the
resulting wave when they interact?
a trough of 1 cm
a crest of 5 cm
a crest of 1 cm
a trough of 5 cm

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

Agirl throws a ball. if the ball's acceleration is 12 m/sec/sec and its mass is 0.5 kg, how much force did the girl apply to the ball?