Find the speed of the melon as it flies off the performer's head. event: initial final mass/object/velocity mass/object/velocity 0 b. Draw a momentum conservation diagram for the stunt. The arrow passes through the melon and emerges with a speed of 18 m/s. An archer shoots a 50 g arrow at the melon with a speed of 30 m/s. A 2 kg melon is balanced on a circus performer's head. Calculate the impulse that each girl imparts to the other. event: initial final mass/object/velocity mass/object/velocity 0 0 + b. Show the effect of the push on both girls with a momentum conservation diagram. The taller girl pushes the shorter girl so that the shorter girl rolls away at a speed of 10 m/s. Two girls with masses of 50 kg and 70 kg are at rest on frictionless in-line skates. What was the velocity of the cart after the boy jumped? Modeling Instruction - AMTA 2013 2 U9 Momentum - ws 3 v3.1 5. How large an impulse did the boy give to the cart? d. Find the speed of the melon as it flies off the performers head.The effect of a force on an object depends on how long it acts, as well as the strength of the force. event: initial final mass/object/velocity mass/object/velocity 0 + 0 b. Impulsive Force Model Worksheet 1 Qualitative Impulse Momentum Nylon ropes stretch considerably under tension and are favored by mountain climbers.
Complete the momentum conservation diagram. A 70 kg boy, riding in the cart, jumps off so that he hits the floor with zero velocity. A 50 kg cart is moving across a frictionless floor at 2.0 m/s. How much force did the racket exert on the ball? 4. event: initial final mass/object/velocity mass/object/velocity 0 + b. Use a momentum conservation diagram to show the change in momentum of the ball. A tennis player returns a 30 m/s serve straight back at 25 m/s, after making contact with the ball for 0.50 s. CModeling Instruction - AMTA 2013 U9 Momentum-Ws 3 v3.1 3.
Find the speed with which the astronaut moves off into space. event: initial final mass/object/velocity mass/object/velocity 0 Momentum conservation equation: b. By pushing the tank away with a speed of 2.0 m/s, the astronaut recoils in the opposite direction. An astronaut of mass 80 kg carries an empty oxygen tank of mass 10 kg. event: initial final mass/object/velocity mass/object/velocity + 0 Momentum conservation equation: b. Each of the boxcars has a mass of 9000 kg when empty, and the loaded car contains 55,000 kg of lumber. An empty boxcar, coasting at 3 m/s, strikes a loaded car that is stationary, and the cars couple together. In a railroad yard, a train is being assembled. When you increase velocity it increases momentum.Name Date Pd Impulsive Force Model Worksheet 3: Conservation of Momentum I 1.
Question: When starting a heavy train, why will train engineers sometimes back up, stop, and then proceed forward? (This technique is called “bunching slack”.)Īnswer: The objective is to gain momentum using force you used before. Question: Nylon ropes stretch considerably under tension and are favored by mountain climbers because the ropes So if it takes more time to hit something then it would hurt less based on force being less. Question: Why are padded dashboards safer than hard dashboards in automobilesĪnswer: In terms of impulse, FT=P, the more F the less time, since they’re inverse. Mass is again inverse to acceleration meaning the less mass the greater the acceleration. Question: Which vehicle will experience the greater acceleration?Īnswer: The Beetle because F/M=a. P/M=V, mass is inverse to velocity so the less mass, the faster. Question: Which vehicle will experience the greater change in momentum? Justify your answer.Īnswer: The Beetle because it has less mass which means it goes faster. The cars will both exert an action/reaction force onto each other. Which vehicle will experience the greater force of impact? Justify your answer.Īnswer: The force of impact will be the same for both based on Newton’s 3rd Law- action reaction. Question: A Hummer and a VW Beetle traveling at equal speeds have a head-on collision. The ball that bounces has a GREATER change in momentum being that the numerical value is larger.
Question: Which has the greater change in momentum, a 50 gram clay ball that strikes a wall at 1 m/s and sticks or a 50 gram superball that strikes a wall at 1 m/s and bounces away from the wall at 8.0 m/s? Explain? Newton’s first law says that there’s not enough friction to stop/turn you. Will you roll backwards if you go through the motions of throwing the ball, but hold on to it instead? Explain your reasoning.Īnswer: You’ll go forward because your roller skates stay in motion. Question: If you throw a ball horizontally while standing on roller skates, you roll backwards.