If you drop a silver dollar off a building and it hits the ground in 10 seconds, how fast was the coin going just before?

An uplifted block of rock between two normal faults

Aballet student who learns with the of his instructor is demonstrating learning.

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.