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When an object moves in a circular path with uniform speed, its motion is called ________.
linear motion
uniform circular motion
motion along a straight line
motion along a hemisphere
uniform circular motion
When an object moves along a circular path at a constant speed, the motion is defined as uniform circular motion. Although the speed remains constant, the velocity is constantly changing due to the continuous change in the direction of motion at every point on the circle.
When an object moves along a circular path at a constant speed, the motion is defined as uniform circular motion. Although the speed remains constant, the velocity is constantly changing due to the continuous change in the direction of motion at every point on the circle.
A stone tied to a string being whirled in a circle; while the hand pulls the string at a constant rate, the stone's path is constantly bent inward to maintain the circular trajectory.
Uniform = Constant Speed; Circular = Changing Direction.
v=T2╧АrтАЛ тАФ speed in circular motion where r is radius and T is the period
acтАЛ=rv2тАЛ тАФ centripetal acceleration where v is velocity and r is radius
In uniform circular motion, the object is subject to a centripetal force directed toward the center of the circular path. According to Newton's Second Law, this force results in a centripetal acceleration, which is directed radially inward and is perpendicular to the velocity vector, thereby changing the direction of the velocity without affecting its magnitude (speed).
The speed of the object is constant, but the velocity is variable.
The acceleration in uniform circular motion is always directed toward the center of the circle.
Uniform circular motion is an example of accelerated motion.
The time taken to complete one revolution is called the time period.
Used to maintain stable orbits for satellites.
Fundamental principle behind centrifuges and amusement park rides.
Requires a continuous centripetal force to maintain the path; if this force is removed, the object moves off in a straight line tangent to the circle.
Planetary motion around the Sun.
Rotation of blades in a ceiling fan at a constant speed.
Linear motion involves travel along a straight path with no change in direction unless an external force acts along the line of motion.
Option A (linear motion) is incorrect because circular motion by definition involves changing direction continuously, which is not linear.
B is correct тАФ Uniform circular motion is the specific term for an object traveling in a circle at a constant speed.
Always remember that in uniform circular motion, acceleration is non-zero because velocity is a vector quantity; a change in direction is a change in velocity.
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