Particle Models in Two Dimensions Worksheet 1:
Name
Date Pd
2-D Motion Worksheet 1:
Free-Fall Kinematics
Physics
1. Emmanuella throws her Springboard Book downward with an initial speed of 20 m/s on Earth.
a. Make a labeled diagram (specify the (+) direction), then make a motion map of the situation.
b. What is the acceleration of the book?
c. Calculate the displacement during the first 4 s.
d. Calculate the time required to reach a speed of 50 m/s.
e. Calculate the time required to fall 300 m (Hint: find the final velocity first, then find the time. You could also use the quadratic formula).
f. Calculate the speed after falling 100 m.
2. Hannah was tired of school lunch so she throws her bosco sticks upward with an initial speed of 15 m/s on Earth.
|a. Make a well-labeled diagram of the situation. |b. Make a list of given quantities and quantities to find, labeled |
| |with units and appropriate algebraic signs (+, -). |
c. What is the acceleration of one bosco stick?
d. Calculate the bosco stick's height after 1 sec.
e. Calculate the time required to reach an upward speed of 3 m/s.
f. Calculate the time required to reach a downward speed of 5 m/s.
g. Miss Greer loves bosco sticks. Calculate the time required for Miss Greer to eat all the bosco sticks.
3. When Mina drops a mango off the edge of a cliff, it takes 4.0 s to reach the ground below. When she throws the mango down, it strikes the ground in 3.0 s. It also makes a pretty awesome splat. What initial speed did she give the mango?
4. Priya was at the bottom of the cliff and was kind of upset she got mango juice on her. She wanted to get back at Mina so threw the mango straight up. The mango is thrown straight up with an initial speed of 22 m/s. How long will it be in the air before it returns to the thrower (assuming she can’t throuw it high enough)? Graph the vertical position, velocity, and acceleration of the mango on the axes provided. Make a well-labeled diagram of the situation. Make a list of given quantities and quantities to find, labeled with units and appropriate algebraic signs (+, -).
b. Draw a velocity and an acceleration motion map for the trip.
5. A lobster punted vertically by Steven has a hang time of 3.8 seconds. What was its initial velocity? Make a well-labeled diagram of the situation. Make a list of given quantities and quantities to find, labeled with units and appropriate algebraic signs (+, -). (he was upset because his pencil was stuck in the ceiling of Miss Greer’s classroom -_-)
5. Melissa throws the poor punted lobster off a 120 m high pier with an initial downward speed of 10 m/s. She will save the lobster.
a. How long does it take the lobster to hit the water below?
b. How fast is the lobster going at the moment of impact?
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