I WILL GIVE BRAINIEST For 20.0 seconds, a caterpillar crawled directly toward a plant at a constant velocity. In that time, it crawled 212 millimeters, and it was passed by a butterfly flying at 1,800 millimeters per second. What was the caterpillar's velocity?

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants