50 The figure below gives the path of a squirrel moving about on level ground, from point A (at time t= 0), to points B (at t-4.90 min), C (at t= 9.80 min), and finally D (at t= 14.7 min). Consider the average velocities of the squirrel from point A to each of the other three points. 2 (m) 25 ok -251 x (m) 50 -50L (a) of the three average velocities, which has the least magnitude? -Select- What is this average velocity in magnitude-angle notation? m/s, (b) Which has the greatest magnitude? -Select- counterclockwise from the +x-axis What is this average velocity in magnitude-angle notation? counterclockwise from the +x-axis

A special racing car starts from rest and accelerates in a straight line with a constant acceleration of 5.8 m/s². After 376 metres, it deploys a parachute which results in a deceleration of kv? where v is the speed of the car in m/s and k is a constant (has a unit of 1/m). If the car's speed slowed down to 37 km/hr 7.5 seconds after the parachute was deployed, determine the constant k and then give your answer to Z = 1000*|k| rounded to two decimal places. Note that |k| means the absolute value of k.

5

You get in your car and drive north, accelerating up to 60mph. Draw your velocity vector and acceleration vector some time during your acceleration. How would these change if you encountered traffic and started to brake?