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cassiemyers60
20.09.2020 •
Physics
A school bus moves at 15 m/s relative to an outside observer. If a student walks toward the front of the bus at 3 m/s relative to the bus, how fast is the student moving relative to the observer?
If the same student turns around and walks to the back of the bus at 3 m/s, what is the relative velocity of
the student to the observer?
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Ответ:
A.) 18 m/s
B.) 12 m/s
Explanation:
Given that a school bus moves at 15 m/s relative to an outside observer. If a student walks toward the front of the bus at 3 m/s relative to the bus, how fast is the student moving relative to the observer ?
Since the student direction is in the direction of the bus, the student velocity relative to the bus velocity will be:
15 + 3 = 18 m/s
Therefore, the observer will see the student moving very fast at a speed of 18 m/s
If the same student turns around and walks to the back of the bus at 3 m/s, the student will be moving in an opposite direction. The relative velocity of the student to the observer will be 15 - 3 = 12 m/s
Therefore, the observe will see the student moving very fast at a speed of 12 m/s
Ответ:
The surface area of a sphere can be found using the formula SA=4(x)pi(x)R squared. Middleton Middle School wants to paint kickballs purple for their carnival. The kickballs are all the same size. They used 6923.7 inches
of paint when painting 5 kickballs. What is the radius of each purple kickball? Use 3.14 for pi
x=times
Explanation: