Category Archives: Mechanics

Agenda:

• Acceleration vs. Velocity
• Pirates of the Caribbean Free Fall
• “The Rock” WS
• Drop Problems

Homework:

• Castle Learning “FreeFall Physics” by 10/14
• Catapult Project (10/27)
• Finish Up & Down Problem Worksheet

HW: Up & Down Problems

1. An object is thrown straight into the air. When it reaches its highest point, its velocity is ________________ and its acceleration is _____________________.

2. An object is thrown from the ground into the air with a speed of 20 m/s.

a. What is its speed when it hits the ground?

b. What is the object’s total time in the air?

c. What is the maximum height will the object reach?

3. Lebron James slam dunks a basketball and a physics student observes that Lebron’s feet are 1.0 meter above the floor at the peak of his jump. At what upward speed must Lebron leave the floor with to achieve this?

4. A cheerleader is thrown into the air. She is in the air for a total of 2.0 seconds.

a. With what initial velocity was the cheerleader thrown into the air?

b. What was her maximum height?

5. An arrow is shot straight up into the air with a velocity of 50 m/s.

a. What is the total time the arrow is in the air?

b. What is the maximum height above the ground that the arrow reaches?