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College Physics10th EditionChris Vuille, Serway 5,126 solutions Cutnell and Johnson Physics9th EditionJohn D. Cutnell, Johnson 2,467 solutions A slowly moving ship can have a greater momentum than a fast-moving racing car when _______. -its mass is greater than the mass of the car its mass times velocity is greater than that of the car. A slowly moving ship can have a greater momentum than a fast-moving racing car when _______. its mass times velocity is greater than that of the car. The quantity that is called impulse can be measured by the _______. product of force and time. Distinguish between force and impulse. Impulse is force times a time interval. An impulse can be increased by increasing the force or increasing the time interval How is the impulse -momentum relationship related to Newton's second law? When a cannonball is fired from a cannon, the momentum of the recoiling cannon is momentarily _______. equal and opposite to the momentum of the fired cannonball When a cue ball strikes an 8 ball head-on in a game of pool, the cue ball _______. transfers its momentum to the 8 ball. When two vehicles collide, momentum is conserved _______. whether the collision is elastic or inelastic. When a big fish swims into an oncoming smaller fish and swallows it, the momentum of the two-fish system _______. Is it correct to say that, if no net impulse is exerted on a system, then no change in the momentum of the system will occur? When a falling firecracker explodes, the momenta of its pieces _______. vectorally add up to equal the initial momentum of the firecracker In which is momentum conserved: an elastic collision or an inelastic collision? Momentum is conserved in elastic and inelastic collisions. Railroad car A rolls at a certain speed and makes a perfectly elastic collision with car B of the same mass. After the collision, car A is observed to be at rest. How does the speed of car B compare with the initial speed of car A? The speed of car B is equal to the initial speed of A. If the equally massive cars of the preceding question stick together after colliding inelastically, how does their speed after the collision compare with the initial speed of car A? Their speed is half the initial speed of car A. Which has the greater momentum when moving? either of these depending on speed Which of the following has the largest momentum relative to Earth's surface? a pickup truck speeding along a highway A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is A same-size iron ball and wooden ball are dropped simultaneously from a tower and reach the ground at the same time. The iron ball has a greater The speed of a 4-kg ball with a momentum of 12 kg m/s is The mass of a ball moving at 3 m/s with a momentum of 48 kg m/s is If several balls are thrown straight up with different initial speeds, the quantity that will have the same value along their paths is their A motorcycle of mass 100 kilograms slowly rolls off the edge of a cliff and falls for three seconds before reaching the bottom of a gully. Its momentum upon hitting the ground is It is correct to say that impulse is equal to a corresponding change in momentum Padded dashboards in cars are safer in an accident than non-padded ones because passengers hitting the dashboard encounter lengthened time of contact Compared with falling on a stone floor, a wine glass may not break when it falls on a carpeted floor because the stopping time is longer on the carpet. When you jump from an elevated position you usually bend your knees upon reaching the ground, which makes the time of the contact about 10 times that of a stiff-legged landing. In this way the average force your body experiences is If you can't avoid being hit by a fast-moving object, you'll suffer a smaller contact force if you can extend that force over a Whether a truck comes to a stop by crashing into a haystack or a brick wall, the stopping force is greater with the brick wall Whether a truck comes to a stop by crashing into a haystack or a brick wall, the impulse is A cannon recoils while firing a cannonball. The speed of the cannon's recoil is relatively small because the cannon has much more mass than the cannonball A tiny gun made of a strong but very light material fires a bullet more massive than the gun itself. For such a weapon the target would be safer than the shooter A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared with the force that stops the car, the force needed to stop the truck is The average braking force of a 1000-kg car moving at 10 m/s braking to a stop in 5 s is As Bronco Brown steps off a hovering high-flying helicopter and falls through the air, he experiences -an impulse. When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard, the speed of the skateboard Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard. The reason he doesn't slip off the skateboard is due to friction between his feet and the board. You're driving down the highway and a bug spatters into your windshield. Which undergoes the greater change in momentum during the time of contact? An astronaut floating alone in outer space throws a baseball. If the ball moves away at 20 m/s, the astronaut will move in the opposite direction at a lower speed Two billiard balls having the same mass and speed roll toward each other. What is their combined momentum after they meet? An open freight car rolls friction free along a horizontal track in a pouring rain that falls vertically. As water accumulates in the car, the car's speed A 1-kg chunk of putty moving at 1 m/s collides with and sticks to a 5-kg bowling ball initially at rest. The bowling ball and putty then move with a momentum of A 2-kg rifle that is suspended by strings fires a 0.01-kg bullet at 200 m/s. The recoil velocity of the rifle is about A 5000-kg freight car moving at 2 m/s collides with a 10,000-kg freight car at rest. They couple upon collision and move away at A 5000-kg freight car collides with a 10,000-kg freight car at rest. They couple upon collision and move at 2 m/s. What was the initial speed of the 5000-kg car? A red car has a head-on collision with an approaching blue car with the same magnitude of momentum. A green car driving with the same momentum as the other cars collides with an enormously massive wall. Which of the three cars will experience the greatest impulse? Two vehicles with equal magnitudes of momentum traveling at right angles to each other undergo an inelastic collision. The combined wreck moves in a direction at 45 degrees to the direction of either car before collision. When a vertically falling firecracker bursts, the vector sum of momentum fragments -in the horizontal direction cancels to zero. A cannonball following a parabolic path explodes into fragments. The momentum of the fragments continue along the path as if the explosion didn't occur What is the magnitude of the impulse on an 7.2- If a monkey floating in outer space throws his hat away, the hat and the monkey will both move away from each other, but at different speeds. A 5-kg shark swimming at 1 m/s swallows an absent-minded 1-kg fish swimming toward it at 4 m/s. The speed of the shark after his meal is Two identical objects in outer space, one moving at 2 m/s, the other at 1 m/s, have a head-on collision and stick together. Their combined speed after the collision is Two vehicles with equal magnitudes of momentum traveling at right angles to each other undergo an inelastic collision. The magnitude of momentum for the combined wreck is greater than the magnitude of momentum of either car before collision. Why does a fast moving car have more momentum than a slow moving car of the same mass?Momentum is the mass of an object multiplied by its velocity. A moving truck has more momentum than a car moving at the same speed because the truck has more mass. A fast car can have more momentum than a slow truck. A truck at rest has no momentum at all.
How can a huge ship have an enormous momentum when it moves relatively slowly?How can a huge ship have an enormous amount of momentum when it moves relatively slowly? It has a huge mass. How does an impulse differ from force? An impulse is force times the time that force is applied.
Which has greater momentum an automobile at rest or a moving skateboard?Answer and Explanation: (2) A moving skateboard has greater momentum.
Which has a greater momentum a heavy truck or a moving automobile?Which has a greater momentum, a heavy truck at rest or a moving automobile? The truck at rest has no speed, hence no momentum. So the moving automobile has greater momentum.
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A slowly moving ship can have a greater momentum than a fast-moving racing car when _______.
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