A stone is thrown horizontally with an initial Speed 0f10 m/s from th d e e stones trajectory time from the top of the cliff t0 the bottom to be 4 3 s g6 of a cliff. A stop watch measm-es the What is the height of the cliff? 40) A girl throws a rock horizontally, with a velocity of 10 m/s ff ' ter below. How i does the rock travel horizontally before striking the water? out a budge. It falls 20 m to the W3 at 41) A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 in. With what speed was it thrown? Projectile Problems - Type 2 42) A boy throws a IOCk With an initial \"310th Of 2'15 mis at 300 above the horizontal. If air resistance is negligible, how long does it take for the rock to reach the maximum height of its trajectory? 43) A jumper in the long-jump goes into the jump with a speed of 12 m/s at an angle of 20 above the horizontal. How long is the jumper in the air before returning to the Earth? 44) A projectile is launched with an initial velocity of 60.0 m/s at an angle of 300 above the horizontal. How far does it travel? 45) What is the maximum distance we can shoot a dart, from ground level, provided our toy dart gun gives a maximum initial velocity of 2'78 W5 and air resistance is negligible? 46) A catapult is tested by Roman legionnaires. They tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): Range = 0.2 km angle of launch is 45 landing height = launch height. What is the initial velocity of launch of the boulders if air resistance is negligible? 47) A hobby rocket reaches a height of 723 m and lands 111. m from the launch point with no air resistance. What was the angle of launch? Projectile Problems - Type 3 48) A ball is thrown at a 600 angle above the horizontal across level ground. It is thrown from a height of 2.00 m above the ground with a speed of 20.0 m/s and experiences no appreciable air resistance. The time the ball remains in the air before striking the ground is closest to 49) A rock is thrown at a window that is located 18.0 m above the ground. The rock is thrown at an angle of 40.04: above horizontal. The rock is thrown from a height of 2.00 In above the ground with a speed of 30.0 m/s and experiences no appreciable air resistance. If the rock strikes the window on its upward trajectory, from what horizontal distance from the window was it released? 50) A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.00 hand 1.00 m above the ground and experience negligible air resistance. (a) How far from where the child is standing does the ball hit the ground? (1)) How long is the ball in ight before it hits the ground? above the horizontal. The ball leaves her 51) A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.00 above the h . hand 1.00 In above the ground and experience negligible air resistance. Onzontali The ball leav (a) What is the magnitude of the hall's velocity just before it hits the ground? 85 her (b) At what angle below the horizontal does the ball approach the ground
