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A 1200-kg car, moving at 13.1 m/s suddenly collides with a stationary car of mass 1500 kg. If the two vehicles lock together, what is their combined velocity immediately after the collision?
A 1200-kg car, moving at 13.1 m/s suddenly collides with a stationary car of mass 1500 kg. If the two vehicles lock together, what is their combined velocity immediately after the collision?
A 60-kg student jumps horizontally from a 150-kg raft with a speed of 1.7 m/s. The raft is initially at rest. What is the speed of the raft immediately after the jump if the water has no effect on the speed of the raft (i.e., ignore friction or forces from the water)?
A 60-kg student jumps horizontally from a 150-kg raft with a speed of 1.7 m/s. The raft is initially at rest. What is the speed of the raft immediately after the jump if the water has no effect on the speed of the raft (i.e., ignore friction or forces from the water)?
A 450-gram ball is traveling horizontally at 10.0 m/s to the left when it is suddenly struck horizontally by a bat, causing it to reverse direction and initially travel at 7.50 m/s to the right. If the bat produced an average force of 1250 N on the ball, for how long (in milliseconds) was it in contact with the ball?
A 450-gram ball is traveling horizontally at 10.0 m/s to the left when it is suddenly struck horizontally by a bat, causing it to reverse direction and initially travel at 7.50 m/s to the right. If the bat produced an average force of 1250 N on the ball, for how long (in milliseconds) was it in contact with the ball?
A 12,000-kg boxcar is coasting at 1.20 m/s along a horizontal track when it suddenly hits and couples with a stationary 15,000-kg boxcar. What is the speed of the cars just after the collision?
A 12,000-kg boxcar is coasting at 1.20 m/s along a horizontal track when it suddenly hits and couples with a stationary 15,000-kg boxcar. What is the speed of the cars just after the collision?
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Andy throws a 0.140-kg baseball with a velocity of 21.3 m/s. Laura strikes the ball with the bat with an average force of 5000 N, which results in a velocity of 32.0 m/s in the opposite direction from the original velocity. How long were the bat and ball in contact?
Andy throws a 0.140-kg baseball with a velocity of 21.3 m/s. Laura strikes the ball with the bat with an average force of 5000 N, which results in a velocity of 32.0 m/s in the opposite direction from the original velocity. How long were the bat and ball in contact?
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Two objects of equal mass are thrown at a wall with equal speeds. One bounces back with the same speed, and the other sticks to the wall. Which object experiences the greater change in momentum?
Two objects of equal mass are thrown at a wall with equal speeds. One bounces back with the same speed, and the other sticks to the wall. Which object experiences the greater change in momentum?
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If the mass and speed of a car are both doubled, how does the magnitude of its momentum change?
If the mass and speed of a car are both doubled, how does the magnitude of its momentum change?
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Michelle is standing on frictionless ice. Cindy throws a book towards her. To maximize her speed, should Michelle catch the book or deflect it back?
Michelle is standing on frictionless ice. Cindy throws a book towards her. To maximize her speed, should Michelle catch the book or deflect it back?
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In a car crash where a small car and a Hummer collide and stick together, what is true about the total momentum of the system?
In a car crash where a small car and a Hummer collide and stick together, what is true about the total momentum of the system?
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A Honda Civic, a Jeep, and a monster truck accelerate from rest with the same net force. After 8 seconds, which car has the most momentum?
A Honda Civic, a Jeep, and a monster truck accelerate from rest with the same net force. After 8 seconds, which car has the most momentum?
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In a collision between two unequal masses, which mass receives a greater magnitude of impulse?
In a collision between two unequal masses, which mass receives a greater magnitude of impulse?
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Identical forces act for the same time on two different objects. What can be said about the change in momentum of the lighter object compared to the heavier object?
Identical forces act for the same time on two different objects. What can be said about the change in momentum of the lighter object compared to the heavier object?
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Which statement accurately describe the effect of an inelastic collision?
Which statement accurately describe the effect of an inelastic collision?
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A 1.0-kg ball moving eastward at 3.0 m/s collides with and sticks to a 2.5-kg ball moving northward at 2.0 m/s. What is the magnitude of the momentum of the combined system just after the collision?
A 1.0-kg ball moving eastward at 3.0 m/s collides with and sticks to a 2.5-kg ball moving northward at 2.0 m/s. What is the magnitude of the momentum of the combined system just after the collision?
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Alexis drops a 0.14-kg baseball from 3.0 m. What is the magnitude of its momentum just before hitting the ground?
Alexis drops a 0.14-kg baseball from 3.0 m. What is the magnitude of its momentum just before hitting the ground?
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Three objects are moving along a straight line as shown. The masses are 7.00 kg, 14.0 kg, and 5.00 kg and their velocities are 5.00 m/s, 4.00 m/s and 2.00 m/s respectively. Taking the positive direction to be the right, what is the total momentum of the system?
Three objects are moving along a straight line as shown. The masses are 7.00 kg, 14.0 kg, and 5.00 kg and their velocities are 5.00 m/s, 4.00 m/s and 2.00 m/s respectively. Taking the positive direction to be the right, what is the total momentum of the system?
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Aaron throws a soccer ball vertically downward with a speed of 0.250 m/s. It takes 0.548 s to reach the ground. The mass of the soccer ball is 0.43 kg. What is the magnitude of the momentum of the ball just before it hits the ground?
Aaron throws a soccer ball vertically downward with a speed of 0.250 m/s. It takes 0.548 s to reach the ground. The mass of the soccer ball is 0.43 kg. What is the magnitude of the momentum of the ball just before it hits the ground?
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Chris throws a 0.50-kg ball horizontally at 20 m/s at a wall. The ball rebounds at 18 m/s. What is the magnitude of the change in the momentum of the ball during the rebound?
Chris throws a 0.50-kg ball horizontally at 20 m/s at a wall. The ball rebounds at 18 m/s. What is the magnitude of the change in the momentum of the ball during the rebound?
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If a system's total momentum is conserved, which of the following must be true?
If a system's total momentum is conserved, which of the following must be true?
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Which of the following is NOT a unit of momentum?
Which of the following is NOT a unit of momentum?
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Two objects collide inelastically. Which statement is correct?
Two objects collide inelastically. Which statement is correct?
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What is the velocity of the ball just before it strikes the ground?
What is the velocity of the ball just before it strikes the ground?
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What is the momentum of the ball just before it strikes the ground?
What is the momentum of the ball just before it strikes the ground?
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What is the change in momentum of the 60-kg skater after the push?
What is the change in momentum of the 60-kg skater after the push?
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What is the speed of the 60-kg skater after the push?
What is the speed of the 60-kg skater after the push?
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What is the change in momentum of the crate during the 10 seconds that the force acts?
What is the change in momentum of the crate during the 10 seconds that the force acts?
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If the golf ball's velocity after being hit is 30 m/s, what was the golf ball's change in momentum?
If the golf ball's velocity after being hit is 30 m/s, what was the golf ball's change in momentum?
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Study Notes
Momentum Conservation
- Momentum is conserved in an isolated system only in elastic collisions.
- Momentum is always conserved in an isolated system.
- In a collision of two objects, the objects each receive the same impulse.
- If objects stick together in an inelastic collision, momentum is conserved, but kinetic energy is not.
Momentum and Collisions
- Momentum is conserved in a collision in which two vehicles collide and stick together.
- The total momentum of the system is conserved.
- Momentum can be calculated with the formula p = mv.
Changes in Momentum
- Momentum change is equal to the impulse.
- Impulse is equal to the area under a force-time graph.
- If two objects have the same force acting for the same time, they will experience the same change in momentum.
- Momentum is a vector quantity; both magnitude and direction matter.
Momentum in Various Situations
- When a ball is dropped, its momentum is calculated using the formula: p = mv; where p is momentum, m is mass, and v is velocity.
- Momentum just before a ball hits the ground can be calculated; the magnitude should be stated, and the direction should be explicitly mentioned as downward.
- A 45-kg skater and a 60-kg skater will experience an equal but opposite momentum when they push each other away from a static position.
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Description
Explore the principles of momentum and collisions in this quiz. Understand key concepts such as momentum conservation in isolated systems, impulse, and the differences between elastic and inelastic collisions. Test your knowledge on how momentum is calculated and its implications in various scenarios.
