b. It changes the direction of the force applied to raise the piano.
A pulley allows you to change the direction of the force needed to lift an object. Instead of lifting an object straight up, you can use a pulley to lift it in a different direction that is easier for you to apply force. This makes it easier to lift heavy objects by reducing the amount of force needed to lift them. Additionally, pulleys can allow multiple people to work together to lift a heavy object, making the process even easier.
How does the pulley make work easier?
a
It changes the mass of the piano, making it easy to raise
b
It changes the direction of the force applied to raise the piano
c
It changes the duration of time to raise the piano
d
It changes the amount of energy needed to raise the piano
1 answer
1 answer