If a disk rolls smoothly across a floor, the velocity is zero of the point that is in contact with the floor.
<h3>What is Velocity?</h3>
Observed from a specific point of view and measured according to a specific unit of time, velocity is the direction at which an object is moving and serves as a measure of how quickly its position is changing.
<h3>What is known as velocity?</h3>
A particle or object moves with respect to time when moving at a certain speed, which is expressed vectorially as velocity. Meters per second (m/s) is the commonly used unit for measuring velocity magnitude, also known as speed. A different way to indicate velocity magnitude is with the centimeter per second (cm/s) unit.
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Answer:
You drive 60 miles in one hour if you drive at 60 miles an hour. You are traveling at one mile a minute.
Explanation:
You would travel one mile if you move at one mile an hour.
When child swings on the swings energy transfers from potential (on the top points) to the kinetic (on the bottom).
Answer:
A+B+C=7j+k
Explanation:
A=3i+4j
B=2i-2j+4k
C=i+5j-3k
A=3i+4j
+
B=<u>2</u><u>i</u><u>-</u><u>2</u><u>j</u><u>+</u><u>4</u><u>k</u>
i+2j+4k
A+B=i+2j+4k
+
C=<u>-i+</u><u>5</u><u>j</u><u>-</u><u>3</u><u>k</u>
7j+k
A+B+C=7j+k
So first we have to solve for the total momentum of the entire system. We can do this by solving momentum for the first train. The equation for momentum is p=mv, where "p" is momentum.
Total momentum is
When the first train comes to a complete stop, it is an elastic collision. We can use conservation of momentum to solve for the velocity of the second train.
If they stick completely, then it is an inelastic collision. Here we have to combine the mass of the two trains and solve for the velocity.
Finally, if the train is 20m/s then what is the velocity of the first train. Just like before, we can solve using conservation of momentum.