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cmwestbr

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**Can someone help me with "The Normal Force"**

1) Anyone know how to work out these problems?

A 42 kg crate rests on a horizontal floor, and a 76 kg person is standing on the crate.

(a) Determine the magnitude of the normal force that the floor exerts on the crate.

(b) Determine the magnitude of the normal force that the crate exerts on the person.

2) A 86.0 kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations?

(a) when the elevator is accelerating upward with an acceleration of 1.10 m/s2

(b) when the elevator is moving upward at a constant speed

(c) when the elevator is accelerating downward with an acceleration of 1.20 m/s2

3) A car is traveling up a hill that is inclined at an angle of above the horizontal.

Determine the ratio of the magnitude of the normal force to the weight of the car when = 12° Whats the Ratio?

Determine the ratio of the magnitude of the normal force to the weight of the car when = 32°Whats the Ratio?