## Solution:

### Part A

The total number of radians made by the object is the area under the graph. Based on the given graph, the total number of radians is $\displaystyle \theta _{rad}=60\:radians$

Convert this to revolutions, knowing that 2π radians is equal to 1 revolution. $\displaystyle revolutions=60\:rad\times \frac{1\:rev}{2\pi }=\frac{60}{2\pi }rev=9.5\:rev$

## The direction of Velocity at Various Times in Flight for Projectile Motion| University Physics

### Alex, a mountaineer, must make it across a wide crevasse. Alex runs horizontally off the edge and successfully makes it to the other side of the crevasse, which is below the point from which he takes off, as shown in the figure. ### At the buzzer, a basketball player shoots a desperation shot. The ball goes in! ## Conceptual Problem about Projectile Motion| University Physics

### Projectile motion is symmetric about the peak, provided the object lands at the same vertical height from which it was launched, as is the case here. Hence $y_2=y_0=0\:m$ $y_2=y_0=0\:m$. ## Velocity in a Moving Frame| University Physics

### You are attempting to row across a stream in your rowboat. Your paddling speed relative to still water is 3.0 m/s (i.e., if you were to paddle in water without a current, you would move with a speed of 3.0 m/s ). You head off by rowing directly north, across the stream. Assume that the stream flows east at 4.0 m/s, determine how far downstream of your starting point you will finally reach the opposite shore if the stream is 6.0 meters wide. 