A cannonball is fired with an initial velocity v, of 91.8 m/s, at an angle of e, = 57° with the horizontal. At the top of the trajectory, the cannonball explodes into three fragments of masses m,, m,= m, and m,= 2m, The fragment with mass m, travels along the +x direction with a speed of 45 m/s. The fragment with mass m, falls vertically downward with a speed of 48 m/s. Find the magnitude of the velocity of the fragment m, Answer: 110 m/s The correct answer is: 120.01 m/s Find the direction (angle) of the velocity of the fragment m, as measured from the positive x-axis.
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- The figure gives an overhead view of the path taken by a 0.164 kg cue ball as it bounces from a rail of a pool table. The ball's initial speed is 2.77 m/s, and the angle 0₁ is 64.6°. The bounce reverses the y component of the ball's velocity but does not alter the x component. What are (a) angle 82 and (b) the magnitude of the change in the ball's linear momentum? (The fact that the ball rolls is irrelevant to the problem.) (a) Number (b) Number i Units Units 0₁ 0₂ <A spaceship, with a mass of 10000 kg, is traveling at a speed of v0 = 300 m/s. Suddenly, the engine explodes and the spaceship breaks into two separate pieces. The large engine piece contains 70% of the original mass, and moves away from the explosion at a speed of v1f=50m/s at an angle of 60◦,as shownWhat speed and in what direction is the smaller piece moving, which contains the cockpit and the astronauts?A large block of mass 3.80 kg slides on a frictionless table and collides head-on with a small block of mass 2.50 kg. After the collision both blocks move in the same direction as the original motion of the large block, and fall off the edge of the table. The small block hits the floor at a point 2.18 meters horizontally from the edge of the table, while the large block hits the floor at a point 1.38 meters horizontally from the edge of the table. The top of the table is 1.10 m above the floor. Find the speed, in m/s, of the large block before the collision.
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