1. A 15.0-g marble is dropped from rest onto the floor 1.44 m below. (a) If the marble bounces straight upward to a height of 0.640 m, what are the magnitude and direction of the impulse delivered to the marble by the floor? (b) If the marble had bounced to a greater height, would the impulse delivered to it have been greater or less than the impulse found in part (a)? Explain and labled the problem.
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1. A 15.0-g marble is dropped from rest onto the floor 1.44 m below. (a) If the marble bounces straight upward to a height of 0.640 m, what are the magnitude and direction of the impulse delivered to the marble by the floor? (b) If the marble had bounced to a greater height, would the impulse delivered to it have been greater or less than the impulse found in part (a)? Explain and labled the problem.
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- A 0.150 kg lump of clay is dropped from a height of 1.75 monto the floor. It sticks to the floor and does not bounce. What is the magnitude of the impulse ? imparted to the clay by the floor during the impact? Assume that the acceleration due to gravity is ?=9.81 m/s2. The force exerted by the floor on the clay is plotted as a function of time in the figure. What must have been the maximum force ?max exerted by the floor on the clay?A 0.150 kg lump of clay is dropped from a height of 1.75 m onto the floor. It sticks to the floor and does not bounce. What is the magnitude of the impulse J imparted to the clay by the floor during the impact? Assume that the acceleration due to gravity is g = 9.81 m/s². J = The force exerted by the floor on the clay is plotted as a function of time in the figure. What must have been the maximum force Fmax exerted by the floor on the clay? Fmax kg. m/s = N Force (N) F max 0 F 7.5 ms Time (ms)A tennis ball with a mass of 55 grams experiences a contact time with a tennis racket for 29 milliseconds during an executed serve. The velocity of the tennis ball when it leaves the racket during the serve is 75 m/s. a) What impulse (magnitude only) in Ns did the server exert on the tennis ball in his serve? b) What average force (magnitude only) in Newtons did the server exert on the tennis ball in the serve? c) If the opponent returned the serve with a speed of 53 m/s, what impulse (magnitude only) in Ns did the opponent’s racket exert on the ball during the return shot from the serve? (assume the velocity of the ball when it first hits the racket is the same as the serve velocity mentioned above) d) What average force in Newtons (magnitude only) did the opponent’s racket exert on the ball in the return shot if the ball was in contact with the racket for 28 milliseconds?
- A 0.277-kg volleyball approaches a player horizontally with a speed of 14.9 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 21.8 m/s. (a) What impulse is delivered to the ball by the player? (Take the direction of final velocity to be the positive direction. Indicate the direction with the sign of your answer.) kg. m/s (b) If the player's fist is in contact with the ball for 0.0600 s, find the magnitude of the average force exerted on the player's fist. NI. A lump of clay (m = 3.00 kg) is thrown towards a wall at speed v = 3.00 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 3.00 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 2.00 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…A 0.83 kg ball drops vertically onto a floor, hitting with a speed of 20 m/s. It rebounds with an initial speed of 15 m/s. (a) What impulse acts on the ball during the contact? (b) If the ball is in contact with the floor for 0.0103 s, what is the magnitude of the average force on the floor from the ball?
- In utter despair during this test, you kick the wall with force of 1250 N. Before rebounding, your foot is in contact with the wall for 5.95×10-3 s. What is the magnitude of the impulse you deliver to the wall?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…07
- 5. A football player kicks a ball with a force of 1250 N with the player's foot in contact with the ball for 0.006 seconds. a) What is the magnitude of the impulse to the ball when it was kicked? b) After the kick, the ball drops on the ground at a speed of 12 m/s and bounces back up with a speed of 4 m/s. What is the type of collision made by the ball to the ground?TWO-PART QUESTION PART ONE: A 12000 kg tank moving at 8 m/s is broughtto a halt in 1.5 s by a reinforced-steel tankbarrier.What magnitude of the impulse was imparted to the tank?Answer in units of kgm/s. PART TWO: What is the average net force exerted bythe tank on the barrier?Answer in units of N.