6 - Circular Motion

# 6 - Circular Motion - Q1(a Is it possible for an object to...

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Q1) (a) Is it possible for an object to be accelerating when the velocity of the object is constant? (b) When the speed of an object is constant? 1) (a) yes (b) yes 2) (a) yes (b) no 3) (a) no (b) no 4) (a) no (b) yes Q2) A car rounds a curve while maintaining a constant speed. Is there a net force on the car as it rounds the curve? 1) No - its speed is constant. 2) Yes. 3) Depends Q3) An object moving in a circle at constant speed: 1) must have only one force acting on it 2) is not accelerating 3) is held to its path by centrifugal force 4) has an acceleration of constant magnitude 5) has an acceleration that is tangent to the circle

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Q4) A particle moves at constant speed in a circular path. The instantaneous velocity and instantaneous acceleration vectors are: 1) both tangent to the circular path 2) both perpendicular to the circular path 3) perpendicular to each other 4) opposite to each other 5) none of the above Q5) A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v . The centripetal acceleration of the ball can be increased by a factor of 4 by 1) keeping the speed fixed and increasing the radius by a factor of 4. 2) keeping the radius fixed and increasing the speed by a factor of 4. 3) keeping the radius fixed and increasing the period by a factor of 4. 4) keeping the radius fixed and decreasing the period by a factor of 4. 5)
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6 - Circular Motion - Q1(a Is it possible for an object to...

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