After striking the ground, the body of the guitar snaps cleanly off the neck, rebounding upwards with the same speed it had before striking the ground. The collision also severs the guitar strings, so that the guitar body is in free-fall afterwards
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- After striking the ground, the body of the guitar snaps cleanly off the neck, rebounding upwards with the same speed it had before striking the ground. The collision also severs the guitar strings, so that the guitar body is in free-fall afterwards. How much time is there between the collision with the floor and the point when the guitar body reaches its maximum height above the ground?
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- A 0.0112-kg bullet is fired horizontally into a 3.04-kg wooden block attached to one end of a massless, horizontal spring (k = 886 N/m). The other end of the spring is fixed in place, and the spring is unstrained initially. The block rests on a horizontal, frictionless surface. The bullet strikes the block perpendicularly and quickly comes to a halt within it. As a result of this completely inelastic collision, the spring is compressed along its axis and causes the block/bullet to oscillate with an amplitude of 0.264 m. What is the speed of the bullet? m m M W un11. A spring clamped to the table shoots Block 1 (110 g, wood) directly into Block 2 (80 g, steel), this perfectly elastic collision will launch the second block up a ramp. When the spring is compressed 14 cm, the block travels up a ramp that has a height of 86 cm and then compresses another spring (310 N/m) at the top, 5 cm. What then is the spring constant for the first spring? Assume that all surfaces are frictionless. cIT Etlon eIn the figure, block 2 (mass 1.20 kg) is at rest on a frictionless surface and touching the end of an unstretched spring of spring constant 208 N/m. The other end of the spring is fixed to a wall. Block 1 (mass 1.90 kg), traveling at speed v1 = 3.50 m/s, collides with block 2, and the two blocks stick together. When the blocks momentarily stop, by what distance is the spring compressed? eelle Number i Units
- A child is bouncing an a trampoline. The child has a mass of 42.5 kg. She leaves the surface of the trampoline with an initial upwards velocity of 10.2 m/s. When she reaches height 1.60 m above the trampoline (still on the way up), she grabs a large (stationary) plastic block. The mass of the block is 6.00 kg. (Figure 1) For this problem, use g = 9.80 meters per second per second for the magnitude of the acceleration due to gravity. Part A What is the speed vbefor of the child immediately before she grabs the block? Express your answer numerically in meters per second. ▸ View Available Hint(s) vbefore Submit Part B What is the speed vafter of the girl immediately after she grabs the block? Express your answer numerically in meters per second. ▸ View Available Hint(s) Vafter for Part A for Part A undo for Part A redo for Part A reset for Part A keyboard shortcuts for Part A help for Part A Submit for Part B for Part B undo for Part B redo for Part B reset for Part B keyboard shortcuts…A 0.8 kg block is moving horizontally to the right with a speed of 6 m/s when it strikes a vertical wall. After the collision, the block is moving to the left with a speed of 2 m/s. What is the magnitude of the impulse on the block2. How fast is a speeding bullet? The figure below shows a simple form of a ballistic pendulum, which is a system for measuring the speed of a bullet. The bullet, with mass mB, is fired into a block of wood with mass mw, suspended like a pendulum. a. The bullet makes a completely inelastic collision with the block, becoming embedded in it. After the impact, the block swings up to a maximum height h. What is the initial speed v; of the bullet? What becomes of its initial kinetic energy? Give the initial speed in terms of mB, mw, h, and any other physical constants necessary. b. If mB = 5.00 g, mw = 2.00 kg, h = 3.00 cm, what is the initial speed v; of the bullet? c. Using the values given in (b), what is the total kinetic energy of the system just before and just after impact? Explain why your answer makes sense. BEFORE COLLISION mg AFTER COLLISION mg + mw mw TOP OF SWING
- Hi there! I need some help! I am really confused. I do not know how to solve this! A block of mass m = 4.4 kg, moving on frictionless surface with a speed vi = 9.2 m/s, makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 4.4 kg block recoils with a speed of vf = 2.5 m/s. Mass m is closest to: Thank you!1. A steel ball of mass 0.5 kg is fastened to a cord 70 cm long and fixed at the far end, is released when the cord is horizontal. At the bottom of its path, the ball strikes a 2.5 kg steel block initially at rest on a horizontal surface. The collision is elastic. Find a) the speed of the ball and the speed of the block, just after the collision. b) If the block has a coefficient of kinetic friction with the horizontal surface of 0.30, how far does the block slide before coming to rest? Ignore the effect of the frictional force for the duration of the collision. [-2.49 m/s, 1.27 m/s; 0.27 m]One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other words, they stick together after the collision and move off with a common velocity. Momentum is conserved. The speed of the object that is moving initially is 29 m/s. The masses of the two objects are 2.8 and 8.8 kg. Determine the final speed of the two-object system after the collision for the case (a) when the large-mass object is the one moving initially and the case (b) when the small-mass object is the one moving initially.
- Two titanium spheres approach each other head-on with the same speed and collide elastically. After the collision, one of the spheres, whose mass is 330 g, remains at rest. (a) What is the mass of the other sphere? (b) What is the speed of the two-sphere center of mass if the initial speed of each sphere is 2.9 m/s?Q12: In a collinear collision, a particle with an initial speed V, strikes a stationary particle of the same mass. If the final total kinetic energy is 50% greater than the original kinetic energy, the magnitude of the relative velocity between the two particles, after the collision, is (a) v2 v. (b) v./2 (c) v,v2 (d) v.4A truck equipped with a massless spring in front crashes with a stationary truck. The mass of the incoming truck is six times the mass of the normal truck. While the spring is being compressed, the trucks are moving closer together, and while it is expanding they are moving farther apart, but at the instant that the spring is fully compressed, they have no relative motion, which means they are moving at the same speed. At this instant, the cars are moving with a speed of 4.2 m/s. Find the speed of the incoming car before the collision.