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21 Cards in this Set
- Front
- Back
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Change in an object’s position relative to a reference point.
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reference point
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A point from which a situation is being observed. Your point of view.
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frame of reference
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How much distance an object has covered in a certain amount of time.
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speed |
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Distance between point A and point B. They say, “as the crow flies.”
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displacement
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The only time that distance and displacement are equal.
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in a straight line
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100 km/h West
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velocity |
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Name the correct units for velocity. Hint: This plus this.
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m/s + direction
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The momentum of an object is the product of these two variables.
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mass & velocity
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Units for momentum
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kg • m/s
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What has greater momentum?Objects with same mass. Object 1 velocity: 2 m/sObject 2 velocity: .02 km/s
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object 2 .02 km = 20 m
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The rate of change in velocity over some time.
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acceleration
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Speeding up, slowing down, or changing direction.
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three ways an object can accelerate
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m/s2 + direction
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units of acceleration |
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The negative shown here (-5 m/s2) tells the reader that this is happening. |
the object is slowing down |
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Term used to describe an object moving in uniform circular motion. |
centripetal acceleration |
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The coach makes a "U-turn" and moves in the opposite direction. In other words, the coach moves from position A to B to C to D. What is the coaches’s displacement? |
55 yards left |
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The distance a cyclist covers when he travels 8 hr/day at a speed of 16 km/hr. |
128 km?(16 km/hr x 8 hr/day) |
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The mass of an object is 50 kg, and has a velocity of 12 m/s. Calculate momentum. |
600 kg•m/s? |
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A satellite's velocity is 5,000m/s around the Earth. After 60s, it is 10,000 m/s. Calculate acceleration.
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83.3 m/s2 around the Earth?10,000m/s-5,000m/s60s |
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The speed of sound during a thunderstorm is 330 m/s, calculate the time it would take the sound of thunder to travel 1485m. |
4.5s?1485m330 m/s |
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In 1935, a French destroyer, La Terrible, attained one of the fastest speeds for any standard warship. Suppose it took 2.0 min at a constant acceleration of 0.19 m/s2 for the ship to reach its top speed after starting from rest. Calculate the ship’s final speed. |
Vf = 22.8 m/s |
