Question 6 2 pts
A person stands at the top of a tall skyscraper above the street. They throw a penny
downwards with a speed of 1 m/s. It takes 13.9 s to fall to the ground (x = 0 m). Determine
how tall the skyscraper is. HINT: Be careful with positives/negatives!
g = 10 m/s2

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.