Intro to Forces + Newton's Laws Video Lessons

Concept

# Problem: A 140-lb restaurant manager received a shipment of frozen meat in a 1600 N crate. She pushes it across the floor applying a 90 N force with her hands.A) She will feel it pushing back at her with less than 90 N, if the crate is moving forward.B) She will feel a 1600 N force from the crate pushing back at her.C) The crate will push back at her with a force of 140 lb.D) She always feels a 90 N force from the crate pushing back against her hands.E) Only if the crate does not move will she feel a force of 90 N.

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###### Problem Details

A 140-lb restaurant manager received a shipment of frozen meat in a 1600 N crate. She pushes it across the floor applying a 90 N force with her hands.

A) She will feel it pushing back at her with less than 90 N, if the crate is moving forward.

B) She will feel a 1600 N force from the crate pushing back at her.

C) The crate will push back at her with a force of 140 lb.

D) She always feels a 90 N force from the crate pushing back against her hands.

E) Only if the crate does not move will she feel a force of 90 N.