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Transcript
p Impulse = J = Name: ____________________________ Period: _______ Ft Example A: A billiard ball of mass 0.17 kg strikes the side of the pool table with speed 1.1 m/s and rebounds in the opposite direction with a speed of 0.9 m/s. What was the impulse exerted by the ball on the side of the pool table? FORMULA: WORK: ANSWER: Example B: A golfer swings a golf club, hitting a 46-gram golf ball with a force of 100 N, and maintaining contact with the ball for 0.90 seconds. What impulse was imparted to the ball? FORMULA: 1. WORK: ANSWER: A football player kicks a ball with a force of 50 N. Find the impulse on the ball if his foot stays in contact with the football for 0.01 s. FORMULA: 3. ANSWER: What is the impulse of a 3 kg object accelerating from rest to 12 m/s? FORMULA: 2. WORK: WORK: ANSWER: A space shuttle with mass of 7.0 x 10 5 kg begins its orbit with 13,000 kg of fuel and is travelling at 50.0 m/s. Because it is burning fuel, its mass decreases even if it maintains a constant speed. Find its change in momentum if it is still travelling at 50.0 m/s, but now only has 7,000 kg of fuel. FORMULA: WORK: ANSWER: Name: ____________________________ Period: _______ 4. Aunt Mary needs to hang a picture in her bedroom. She uses a hammer to drive the nail into the wall. Find the force exerted by the hammer on the nail if the hammer stays in contact with the nail for 0.5 s and has an impulse of 25 Ns. FORMULA: 5. ANSWER: WORK: ANSWER: A hockey player applies an average force of 80 N to a 0.9-kg hockey puck for a time of 0.2 s. Determine the impulse experienced by the hockey puck. FORMULA: 8. WORK: A pitcher throws a baseball (m = 145 g) at 38.0 m/s toward the catcher. The batter bunts the baseball, sending it straight back toward the pitcher at 38 m/s. What is the change in momentum of the baseball? FORMULA: 7. ANSWER: A van of mass 1200-kg was moving at a velocity of 8 m/s when it was involved in a head on collision with a semi tractor-trailer moving in the opposite direction. Assuming that the van came to stop after the collision, calculate its change in momentum. FORMULA: 6. WORK: WORK: ANSWER: A tennis player, remembering her coach’s emphasis on “follow-through,” kept her racket in contact with the tennis ball for 0.75 s to achieve an impulse of 74 Ns. What was the average force exerted by the racket on the ball? FORMULA: WORK: ANSWER: