Option (b) is correct. Speed is the ratio of the distance an object moves to <u>the amount of time needed to travel the distance. </u>
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Further Explanation:
The speed of a body is defined as the rate of the distance covered by the body. It means that the speed is the measure of the amount of distance covered by a body in a particular interval of time.
The mathematical expression for the velocity of a body is given as.
The above mathematical expression shows that the speed of a body is the ratio of the distance covered by the body to the amount of time taken by the body to cover the particular distance.
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Answer Details:
Grade: High School
Chapter: Speed and distance
Subject: Physics
Keywords: Speed, ratio, distance, displacement, rate of distance, covered by body, time taken, mathematical expression, an object.
Answer:
Weight at the surface of Jupiter's moon Io is 8.13 N .
Explanation:
Given :
Acceleration due to gravity at the surface of Jupiter's moon is .
Weight of watermelon in earth , .
Acceleration due to gravity at the surface of earth is .
We know , weight is given by :
Therefore , mass at the surface of Jupiter's moon Io is :
Hence , this is the required solution .
Answer:
v = 3.84 m/s
Explanation:
In order for the riders to stay pinned against the inside of the drum the frictional force on them must be equal to the centripetal force:
where,
v = minimum speed = ?
g = acceleration due to gravity = 9.81 m/s²
r = radius = 10 m
μ = coefficient of friction = 0.15
Therefore,
<u>v = 3.84 m/s</u>