7. A string of length L, with tension T and mass per unit length u, is hit simultaneously at t = 0 at the two points x = L/3 and x = 2L/3. The impulse delivered at each point is I. Find the subsequent displacement of the string. %3D
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- Question 1 A 0.5 kg ball is thrown vertically upwards with an initial velocity of 10 m s¹¹. At its highest point, it momentarily stops before falling back down to the ground. Calculate the impulse experienced by the ball during the upward journey. ABCD 5 NS - 5 Ns ONS 10 N sQuestion 4. (SSOS) E.e-.e insurogizeA 08 zolayd A 75.0 kg hockey player moving at +10.0 m/s crashes into a second, stationary hockey player. After the collision, the two skaters move as a unit at +4.50 m/s. In the collision, the impulse received by the second hockey player was A. +1.09 x 10³ kg.m/s B. +7.50 × 10² kg-m/s C. +4.13 x 10² kg-m/s D. +3.38 × 10² kg-m/s x mini 73 10 ma4. A 0.060 kg ball hits a wall with an initial speed of 30 m/s in the -x direction and bounces off with the same speed in the +x direction. The graph shows the force of the wall on the ball during the interaction. a) Draw the ball and the wall just before and just after the collision. b) What is the impulse of the force of the wall on the ball? b) What is the maximum value of the contact force Fmax between the wall and the ball? Fmax t (ms) 6 4.
- I. A lump of clay (m = 3.01 kg) is thrown towards a wall at speed v = 3.15 m/s. The lump sticks to the wall. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. II. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 3.15 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic energy lost during this collision. III. Same lump is thrown towards the same wall, but this time it bounces off the wall at speed of 2.24 m/s. (a) What kind of collision is it? Is momentum conserved during this collision? Why or why not? (b) Calculate the impulse imparted on the lump by the wall. (c) Calculate percent of initial kinetic…1.A plate drops onto a smooth floor and shatters into three pieces of equal mass. Two of the pieces go off with equal speeds v at right angles to one another. Find the speed and direction of the third piece. Explain and labled the problem.9. An athlete who is initially at rest in a squatted position jumps vertically upward and then lands going back to the original squatted position (ending at rest with the same center of mass height as at the start). The time period under consideration begins just before the athlete starts the upward motion and ends just after she has landed and comes to rest back in the squatted position. Compare the magnitude and directions of the impulse from the force of the ground on the athlete to the impulse from gravity on the athlete during this time period. Note: there are no other significant forces other than the ground and gravity acting on the athlete during this time period. of