Welcome to the Quiz!
This quiz contains 13 questions from a mix of 1 subtopics.
Which of the following equations defines linear momentum?
p = mv
KE = 1/2mv2
p = ma
F = ma
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If an object's velocity doubles and its mass stays constant, what happens to its momentum?
momentum is halved
momentum doubles
momentum quadruples
momentum stays the same
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What principle states that the total momentum before and after a collision remains constant in a closed system with no external forces?
Newton's second law
conservation of momentum
Newton's first law
Newton's third law
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If the x-component of momentum is conserved in a two-dimensional collision, what else must be true?
the y-component of momentum must also be conserved
the collision must be elastic
the objects must have equal mass
kinetic energy must be conserved
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Object A travelling due east collides with stationary Object B. After the collision, Object A is travelling north-east and Object B south-east. What can we conclude?
momentum was conserved in both x and y directions
momentum was conserved in the x direction only
momentum was conserved in the y direction only
momentum was not conserved at all
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If momentum is conserved in a collision, then:
the total momentum after will equal the total momentum before
the objects must stick together
the collision must be elastic
kinetic energy must also be conserved
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If an object's velocity is doubled and its mass is halved, what happens to its momentum?
momentum quadruples
momentum is halved
momentum doubles
momentum stays the same
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What is the term used to describe collisions where kinetic energy is lost to other forms like heat or sound?
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What is the momentum of a 2 kg object moving at 5 m s-1?
10 kg m s-1
2 kg m s-1
25 kg m s-1
0.4 kg m s-1
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What are the x and y components of a momentum vector with magnitude 5 kg m s-1 pointing 30° above the positive x-axis?
x = 0 kg m s-1, y = 5 kg m s-1
x = 4.33 kg m s-1, y = 2.5 kg m s-1
x = 2.5 kg m s-1, y = 4.33 kg m s-1
x = 5 kg m s-1, y = 0 kg m s-1
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Two particles collide head-on. Particle 1 has a mass of 2 kg and velocity of +4 m/s. Particle 2 is initially at rest and has a mass of 3 kg. After the collision, the particles stick together. What is their final velocity?
+1.6 m s-1
-2 m s-1
+2.67 m s-1
+2 m s-1
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Which of the following best describes an elastic collision between two objects?
both momentum and kinetic energy are conserved
momentum is conserved but kinetic energy is not conserved
both momentum and kinetic energy are increased
both momentum and kinetic are reduced to zero
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An object of mass 2 kg collides head-on with an object of mass 3 kg initially at rest. Before the collision, the 2 kg object was traveling at +2 m/s. After the collision, the two objects stick together and move with a velocity of:
+0.8 m s-1
+2 m s-1
-0.5 m s-1
+1 m s-1
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