Intro to Forces + Newton's Laws Video Lessons

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Problem: A 165 lb researcher received a shipment of lab equipment in a 1600 N crate. She pushes it across the floor applying a 115 N force with her hands. Which of the following is true? A) She always feels a 115 N force from the crate pushing back against her hands. B) The crate will push back at her with a force of 165 lb. C) She will feel a 1600 N force from the crate pushing back at her. D) Only if the crate does not move will she feel a force of 115 N. E) She will feel it pushing back at her with less than 115 N, if the crate is moving forward.

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Problem Details

A 165 lb researcher received a shipment of lab equipment in a 1600 N crate. She pushes it across the floor applying a 115 N force with her hands. Which of the following is true?

A) She always feels a 115 N force from the crate pushing back against her hands.

B) The crate will push back at her with a force of 165 lb.

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

D) Only if the crate does not move will she feel a force of 115 N.

E) She will feel it pushing back at her with less than 115 N, if the crate is moving forward.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Forces + Newton's Laws concept. You can view video lessons to learn Intro to Forces + Newton's Laws. Or if you need more Intro to Forces + Newton's Laws practice, you can also practice Intro to Forces + Newton's Laws practice problems.

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