A force that keeps an object moving in a circle is called?thank you

To continue moving in a circle requires an inward directed force from tension in a string or banking of a curve because the object is continually accelerating toward the center. If you let it go, it would go in a straight line.

The constant acceleration toward the center is called:
CENTRIPETAL ACCELERATION
and must be provided by a
CENTRIPETAL FORCE

The force that keeps an object moving in a circle is called centripetal force.

To understand why this force is needed, let's first talk about circular motion. When an object moves in a circle, it experiences a continuous change in direction. Since velocity is a vector that includes both speed and direction, this change in direction means that the velocity vector is changing.

According to Newton's first law of motion (also known as the law of inertia), an object will continue to move in a straight line at a constant velocity unless acted upon by an external force. In the case of an object moving in a circle, there must be a force acting to continually change its direction.

This force is called the centripetal force. It acts towards the center of the circle and is always perpendicular to the object's velocity. The centripetal force is responsible for keeping the object moving in a curved path and preventing it from flying off in a straight line.

To calculate the magnitude of the centripetal force, you can use the following formula:

Fc = m * (v^2 / r)

Where Fc is the centripetal force, m is the mass of the object, v is its velocity, and r is the radius of the circle.

In conclusion, the force that keeps an object moving in a circle is called the centripetal force, and it is necessary to constantly change the object's direction and prevent it from moving in a straight line.