SPEED / DIRECTION / ACCELERATION / CENTRE / EDGE / CENTRIPETAL / CIRCULAR / TENSION / EARTH / GRAVITY
When an object moves in a circle its 1._____ is a constantly changing even though the speed stays the same. There is a force acting on the object acting towards the 2. ____________ of the circle. This is called the 3. ___________ force. If you swing a ball on a string around your head, then this force is provided by 4. ________ . The force of 5. __________ between the 6. _______ and the moon provides the 7. _______ force needed to keep the moon in a circular orbit.
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1. Earth 2. Centre 3. Gravity 4. Cercular 5. Direction 6. Center 7. Speed.
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