A boy on a train moving at 20.0 m/s relative to the Earth throws a ball horizontally at a velocity of 30.0 m/s relative to the train.  1. What is the horizontal velocity of the ball relative to the Earth? 2. The ball hits the ground in .70 s.  How far does the ball travel horizontally relative to the Earth?

Component Method: With your calculator, determine the x and y components of F1 and F2. Remember that Fx = Fcos θ and Fy = F sin θ. Find the x and y components of the resultant from the sum of x and y components. Draw a right triangle with x and y components as sides, and the hypotenuse representing the resultant. Calculate the magnitude of the resultant from the square root of (Rx2 + Ry2). Calculate the direction of the resultant by using θ R = tan-1 (Ry/Rx).

The Batang Pinoy athlete from your school throws a javelin, always at the same speed, at four different angles (30°, 40°, 60°, and 80°) above the horizontal. Which two throws cause the javelin to land the same distance away? *   a. 30° and 80°   b. 40° and 80°   c, 30° and 60°   d, 40° and 60°

E14. A ball rolls off a table with a horizontal velocity of 5 m/s. If it takes 0.6 seconds for it to reach the floor, a. What is the vertical component of the ball’s velocity just before it hits the floor? (Use g = 10 m/s^2 .)b. What is the horizontal component of the ball’s velocity just before it hits the floor?