15 25o Year 10 Revision Assessment date: Name: Define projectile motion. Define free fall. Given the following diagram. Draw the vertical and horizontal component and calculate them. 15 25o Convert the following velocity between m/s and km/h. What does the slope represent in a distance vs. time graph? m/s km/h 78 13 181 67 56 What does the slope represent in a velocity vs. time graph? Initial Position: Final Position: Total displacement:   Total time: Velocity: Initial Position: Final Position: Total displacement:   Total time: Velocity:

What are Isaac Newton’s three laws? Use the information below to plot a position-time graph for the movement of a remote-control car. The car travels at a velocity of 3.0 m/s [E] for 2.0 s. The car then stops for 4.0 s. For the next 4.0 s, the car travels at a velocity of 4.0 m/s [W]. The car then stops for another 2.0 s. For the next 1.0 s, the car travels at a velocity of 6.0 m/s [E]. Finally, the car travels at a velocity of 2.0 m/s [E] for 4.0 s before coming to a complete stop. What is the car’s final position? Define law of inertia. What does it mean when an object exhibits high inertia? What is the relationship between inertia and mass? The graph below describe Marianna’s trip to the video store and back home by foot. Use the graph to answer the questions below.  State the position of the video store in reference to Marianna’s house. How much time did Marianna spend at the store? What was Marianna’s position 40 minutes after she left her house? What was Marianna’s total distance? What was her total displacement?

Description of Velocity Describes how an object’s velocity changes over a period of time Example: Section A At t = 0s, velocity = 0 m/s [S] At t =2.5 s, velocity = 2 m/s [S] Therefore, velocity is increasing (positive acceleration) and the direction is South Describe the velocity for each section of the graph above. For the magnitude, consider: Is the object at rest or moving? Is the velocity constant or does it change? Is the velocity increasing or decreasing? For direction, consider: What is the direction of the velocity given? Is the velocity positive or negative? In which direction is the object moving? Section Description of Velocity Magnitude Direction A   B C D E

Hint: Since it is free-fall object, vi = 0 m/s A ball is thrown vertically upward. At a time of 0.52 s after it is thrown, it is traveling at a speed of 1.2 m/s in a downward direction. Calculate the velocity at the point it was initially released. Assume upward direction is positive and air resistance is negligible. A boat traveling 5.0 m/s [W] encounters a current traveling 3.5 m/s [N]. What is the resultant velocity of the motor boat with respect to the shore? If the river is 50 meters wide, then how much time does it take the boat to travel shore to shore? Vi=? Bob throws a cat out of a fourth story window with a horizontal velocity of 13 m/s. How far from the building does the cat land if the window is 9m above the ground? A parachute falls from the window 24 m above the ground at a constant velocity of 3.2 m/s. How long does it take for the parachute to hit the ground? How long after the parachute is released should a tennis ball be dropped, from the same point, so that both objects land on the ground at the same time? Hint: Since it is free-fall object, vi = 0 m/s A canon ball is fired at an angle of 60o with an initial velocity of 200.0 m/s. How long is the canon ball in the air? What is the maximum height reached by the canon ball?