An object moving in a circle at constant speed (Choose a correct option with some nice explanation!) a) must have only one force acting on it.
b) is not accelerating.
c) is held to its path by centrifugal force.
d) has an acceleration of constant magnitude.

ABSURB ANSWERS ARE GONNA GET REPORTED. THAT'S IT

an object is moving at constant speed then it has no acceleration.

Explanation:

This is indeed true in the case of an object moving along a straight line path. On the other hand, a particle moving on a curved path is accelerating whether the speed is changing or not. Velocity has both magnitude and direction.

But Than Again when a object moves in a circle at a constant speed its velocity (which is a vector) is constantly changing. Its velocity is changing not because the magnitude of the velocity is changing but because its direction is.

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when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.