Constants You have landed on an unknown planet, Newtonia, and want to know what

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Constants

You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. You find that when a certain tool is pushed on a frictionless horizontal surface by a 12.9 N force, it moves 17.0 m in the first 2.30 s , starting from rest. You next observe that if you release this tool from rest at 11.0 m above the ground, it takes 2.88 s to reach the ground.

Problem 4.48 Extraterrestrial physics Constants Part A You have landed on an unknown planet, Newtonia, and want to know what objects will weigh there. You find that when a certain tool is pushed on a frictionless horizontal surface by a 12.9 N force, it moves 17.0 m in the first 2.30 s, starting from rest. You next observe that if you release this tool from rest at 11.0 m above the ground, it takes 2.88 s to reach the ground What does the tool weigh on Newtonia? Submit Request Answer Part B What would it weigh on Earth? Submit Request Answer Provide Feedback

Explanation / Answer

a)

Using 2nd equation of motion

s= 0.5at^2

17= 0.5* (12.9/m)* (2.3)^2

m= 2 kg

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For free fall

h= 0.5at^2

11= 0.5*a*(2.88^2)

a= 2.652 m/s^2

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a) Fn= 2*2.652=5.3 N

b) Fe= 2*9.8= 19.6 N

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Comment in case any doubt.. good luck

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