Question

select the correct images. identify the arrows that show input force.

Explanation:

Step1: Define input force

Input force is the force applied to a machine to make it do work.

Step2: Analyze first - lever image

The downward - pointing arrow on the lever is the input force as it is the force applied by a user to lift the barrel.

Step3: Analyze pulley image

The downward - pointing arrow on the rope is the input force. It is the force applied by the user to lift the blue object.

Step4: Analyze wheel - barrow image

The upward - pointing arrows on the handles of the wheel - barrow are the input forces. They are the forces applied by the user to lift the load in the barrow.

Answer:

The downward - pointing arrow on the lever, the downward - pointing arrow on the rope of the pulley, the upward - pointing arrows on the handles of the wheel - barrow.