A student measures the time taken for 20 swings of a pendulum. He finds that the time taken is 46 seconds.
What time does the pendulum take for one swing?
b How could the student have found the time for one
swing more accurately?​

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.