Unit#7 2D Motion - Projectile Test L POSSIBLE POINTS: 4 Justin Thyme tosses a piece of granite into the water below. If he throws the ball horizontally at 2.0m/s and it strikes the water 3.5 m away,how much time did it take for the granite to hit the water? 2.0 s 1.8 s 0.65 7s

## Step 1<br />The problem involves the concept of projectile motion. In this case, the granite is thrown horizontally, which means the initial vertical velocity is zero. The horizontal velocity remains constant throughout the motion because there is no horizontal acceleration.<br /><br />## Step 2<br />The horizontal distance covered by the granite is given as 3.5 m, and the horizontal velocity is given as 2.0 m/s. We can use the formula for time in uniform motion, which is:<br /><br />### **Time = Distance / Speed**<br /><br />## Step 3<br />Substitute the given values into the formula:<br /><br />### **Time = 3.5 m / 2.0 m/s**