20. Why do you think this isn’t changing? (Hint: What is affecting the velocity in the y direction, but not the x direction?) Click the “Play” button and then click on “Lab”. https://phet. colorado. edu/sims/html/projectile-motion/lat est/projectile-motion_en. html Use the data table to determine what angle the cannon should be placed. After you fire the cannon ball, use the blue data box to measure the distance the canon ball flew. a. Do this by lining the circle the left of the blue box up with the spot the cannonball landed. b. Range = distance traveled Record the distance the canon ball travels on the data table. Round to the nearest tenth place (ex .1) Select a different projectile from the dropdown box on the right and repeat the above process.

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2