1. How does a fixed pulley act as a machine? O A It changes the direction and the size of the input force
O B It changes the size of the input force only
O C It changes neither the size nor the direction of the input force
OD It changes the direction of the input force only

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Aregular polygon has angkes of size 150° each.how many side has the polygon

Which statement correctly describes the relationship between frequency and wavelength?