Achild is stationary on a swing. the child is given a push by his brother to start him swinging. his brother applies a steady force of 84 n over a distance of 0.25 m. calculate the work done by this force.

Which statement is true about an object that is moving in a circular motion due to centripetal force, f, when the radius of its circular motion is doubled? the new force then becomes equal to 2f the new force then becomes equal to f the new force then becomes equal to f/2 the new force then becomes equal to f2 the new force then becomes equal to 1/f