WQ4.15 1/1 point (graded) Assume that an object moves in counter-clockwise direction on an elliptical path, as shown below. The speed is not constant and the object slows down at point a and speeds up at point b. a b c a) What are the acceleration vectors at points a and b? a b c 0 b a 1 c O b
When objects change their motion (change of direction, slow down, speed up), they accelerate, so acceleration = change in velocity over a change in time (magnitude and/or direction). Forces cause objects to change their motion, and therefore accelerate. Newton's 2nd law makes the connection between forces and acceleration: Fra = CF, = må WQ5.3 1/1 point (graded) Fp (100.ON) mg (98.0N) What is the acceleration of the box? Give your answer is units of [m/s2]. 0.2 V 0.2