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In this week’s lab
we are going to examine conservation of momentum. |
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1. Under what conditions is
linear momentum conserved? |
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Linear momentum
is conserved in the absence of a net external force. |
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2. A cart with a mass of 0.495 kg is
traveling to the right with a velocity of 1.43 m/s. What is the magnitude and direction of the
linear momentum for this cart? |
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3. Two carts A and B crash. Their total linear momentum is found to be 0.710 kg m/s to the left. One cart (B) is brought
to rest. The other (A) moves off after
the crash. If the velocity of cart (A) is 1.42 m/s to the left,
what is the mass of cart (A)? |
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If momentum
before is 0.710 kg m/s to the left, then it must be the same amount 0.710 kg
m/s to the left after. So we can find
the cart’s mass by |
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4. A cart has a mass of 1.100 kg and is
moving with a speed of 0.850 m/s, what kinetic energy does it possess? |
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--> OVER ŕ |
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Mass A is moving to the right with a speed
of 0.95 m/s and has a mass of 0.500 kg.
Mass B is at rest and has a mass of 1.00 kg. After the collision mass B moves off with a
speed of 0.635
m/s to the right. |
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5. What is the magnitude and
direction of the speed of mass A after
the collision? |
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6. What is the kinetic energy of the two
carts before the collision? |
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7. What is the kinetic energy of the two
carts after the collision? |
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