Questions and Answers > SCIENCE PHYSICS_Particle Models in Two Dimensions Worksheet 1: Free-Fall Kinematics

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Particle Models in Two Dimensions Worksheet 1: Free-Fall Kinematics 1. A ball is thrown 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 ball? c. Calculate the displacement during the first 4.0 s. d. Calculate the time required to reach a speed of 50 m/s. e. Calculate the time required to fall 300 m (Hint: factor the quadratic or use the quadratic f. Calculate the speed after falling 100 m. 2. A rock is thrown 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 the rock? d. Calculate the rock's height after 1.0 sec. e. Calculate the time required to reach an upward speed of 3.0 m/s. f. Calculate the time required to reach a downward speed of 5.0 m/s. 3. A ball punted vertically 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 (+, -). 4. A rock 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? Graph the vertical position, velocity, and acceleration of the rock 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 student throws a baseball off a 120 m high bridge with an initial downward speed of 10 m/s. a. How long does it take the ball to hit the ground below? b. How fast is the ball going at the moment of impact? 6. When a kid drops a rock off the edge of a cliff, it takes 4.0 s to reach the ground below. When she throws the rock down, it strikes the ground in 3.0 s. What initial speed did she give the rock? [Show More]

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