What is accomplished by this simple pulley?

(1 point)
Responses

It changes the distance of the pull needed to lift the object.
It changes the distance of the pull needed to lift the object.

It changes the direction of the force needed to lift the object.
It changes the direction of the force needed to lift the object.

It changes the total work done to lift the object.
It changes the total work done to lift the object.

It changes the duration needed to lift the object.

It changes the direction of the force needed to lift the object.

Which advantage does a screw have over a nail? (1 point)

Responses

A screw is pushed through a shorter distance.
A screw is pushed through a shorter distance.

A screw can be inserted with less force than a nail.
A screw can be inserted with less force than a nail.

A screw is able to reduce the total amount of work needed.
A screw is able to reduce the total amount of work needed.

A screw allows the force to be applied in a more convenient direction.

A screw allows the force to be applied in a more convenient direction.

Lifting the weight without a pulley requires a force of 400 newtons over a distance of 4 meters. How do these values change when the pulley is applied?

(1 point)
Responses

Both the force and the distance decrease.
Both the force and the distance decrease.

The force increases, while the distance decreases.
The force increases, while the distance decreases.

The force decreases, while the distance increases.
The force decreases, while the distance increases.

Both the force and the distance increase.
Both the force and the distance increase.

Both the force and the distance decrease.

What is the effect of using this inclined plane?

(1 point)
Responses

The object can be lifted while using a downward force.
The object can be lifted while using a downward force.

The object can be lifted while being pushed over a shorter distance.
The object can be lifted while being pushed over a shorter distance.

The object can be lifted with less total work.
The object can be lifted with less total work.

The object can be lifted with less force.

The object can be lifted with less force.

Which example represents a class 2 lever?(1 point)

Responses

salad tongs picking up salad
salad tongs picking up salad

a car door being opened and shut
a car door being opened and shut

tweezers plucking hairs
tweezers plucking hairs

a screwdriver opening a paint can

a car door being opened and shut