Question

If we push on a heavy crate to the right and it slidesw, what is the direction of friction on the crate?

Answer 1

Friction makes it harder to push. There must be an opposing force. That should be a clue. What do you think?

Remember that you are pushing "to the right"

The question is a bit confusing since one usually thinks of pushing something forward, not to the right or left.

Answer 2

in the opposite direction, so it would be to the left