I need help with wrong ones.

2,273 / 5 points A student stands on the edge of a cliff and throws a stone horizontally to the right and over the edge with a speed of 18.0 m/s. The cliff is 50.0 m above a at, horizontal beach. If the base of the cliff is taken to be the origin of the coordinate system with upward being the positive y-direction,(a) What are the coordinates ofthe initial position of the stone? \\/ |:., ' X a )(b)Whatarethecomponentsoftheinitialvelocity7v0x= - v0y= (c) Write the equations for the x and y components of the velocity of the stone with time. vx = l 18 m /s vy = I (no answer) y = l 50 - 4.9t"2 m ( (d) Write the equations for the position of the stone with respect to time. x = (e) How long after being released does the stone strike the beach below the cliff? (f) With what speed and angle of impact does the stone land? v = i 36.1 m/s 6 = i -60.1 (in degrees S of E) 3.333/5 points From the window of a building, a ball is tossed from a height yO above the ground with an initial velocity of 8.00 m/s and an angle of 200 below the horizontal. It strikes the ground 3.00 5 later. If the base of the building is ta ken to be the origin of the coordinate system with upward being the positive y-direction,(a) What are the initial coordinates of the ball (for subscripts, use the underscore symbol, Ex. y0 = y_0)? ( |:l, :u )(b) Find the x and y components of the initial velocity: v0x- ! 7. 52 m/s v0y = g -2.74 m/s (c) Find the equations for the x and y components of position as functions of time: x= y=l _2 74t 4 992 (d) How far horizontally from the base of the building does the ball strike the ground? g 22. 6 m (e) Find the height from which the ball was thrown. 'Tm (f) How long does it take the ball to reach a point 10.0 m below the level of launching? TE Feedback Based an answering incorrectly X 0/ 5 points A brick is thrown upward from the top of a building at an angle of 25 to the horizontal and with an initial speed of 15 m/s. If the brick is in ight for 3.0 5, how tail is the building? a 25.13m 0/ 5 points A projectile is launched with an initial speed of 60.0 m/s at an angle of 300" above the horizontal. The projectile lands on a hillside 4.00 5 later. Neglecting air resistance, (a) What is the projectile's velocity at the highest point of the trajectory? lZM (b) What is the straight line distance from where the projectile was launched to where it hits its target? Feedback Based on answering incorrectly x 2.5/5 points If a person can jump a maximum horizontal distance of 3.0 m on Earth,(a) What would be his maximum range on the moon, where the free-fall acceleration is g/6? :m (b) Repeat for Mars, where the acceleration due to gravity is 0.38g. 6 0/5 points A ball thrown straight upward and returns to the thrower's hand after 3.00 s in the air. A second ball is thrown at an angle of 30.0 to the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? X 14.715m/s (b) At what speed was the second ball thrown? X 29.43m/s Feedback Based on answering incorrectly Xn 0/5 points A car travels east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of rain on the side windows of the car make an angle of 60.0\" with to the vertical. Find the velocity of the rain with respect to:(a) the car Feedback Based on answering incorrectly x n 3/5 points A farm truck moves due east with a constant velocity of 9.50 m/s on a limitless, horizontal stretch of road. A boy riding on the back of the truck throws a can of soda upward and catches the projectile at the same location on the truck bed, but 16.0 m farther down the road. (a) In the frame of reference of the truck, at what angle relative to the vertical (in degrees) does the boy throw the ca n? M \\/ l:' (b) What is the initial speed of the can relative to the truck? (c) What is the shape of the can's trajectory as seen by the boy? (linear, parabolic, quadratic, etc.) (d) Describe the shape of the can's path as seen by an observer on the ground. (linear, parabolic, quadratic, etc.) (e) Determine the initial velocity of the can. i! 2.5/5 points A coast guard cutter detects an unidentied ship at a distance of 20.0 km in the direction 15.0 east of north. The ship is traveling at 26.0 km/h on a course 40.0\" east of north.T he coast guard wishes to send a speedboat to intercept and investigate the vessel. (a) If the speed boat travels at 50.0 km/h, in what direction should the speed boat head? (Express in degrees E of N) (b) Find the time required for the speedboat to intercept the ship. (Express time in minutes) Feedback Based on answering incorrectly x