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# Gravity

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473
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Jack can just lift 62kg on earth. he is now abducted by aliens and taken to their planet. (after the probing) Jack finds that on their planet he can only lift 22kg. what is the maximum WEIGHT Jack can lift on earth?

physics
Nov 21, 2014

#5
+394
+8

This “planet” has a gravity field higher than Jupiter. His whole body will “feel” nearly three times heaver. Unless this man was built like Arnold Schwarzenegger, he probably wouldn’t be able to lift his head without breaking his neck.

_7UP_

_7UP_
_7UP_
Nov 21, 2014

#1
+94618
+5

Uh.....62 kg ??

Nov 21, 2014
#2
+95361
+5

Umm I don't know about that one Chris

62Kg is a mass not a weight.   (corrected)

1Kg=9.8N     ON EARTH

62Kg=607.6N    ON EARTH

Technically Jack can lift a maximum weight of   607.6N    (It would be the same on the alien planet)

That sounds right to me anyway

http://www.mathsisfun.com/measure/weight-mass.html

Nov 21, 2014
#3
+27377
+5

If Jack can lift a mass of 62kg on Earth, then he is lifting a weight of 62*9.8 N (= 607.6N).

Gravitational acceleration on the alien planet is 9.8*62/22 m/s2 (= 27.6 m/s2)

.

Nov 21, 2014
#4
+95361
+3

Careless error on my part I  shall fix it (I did mean 62 not 22)

Nov 21, 2014
#5
+394
+8

This “planet” has a gravity field higher than Jupiter. His whole body will “feel” nearly three times heaver. Unless this man was built like Arnold Schwarzenegger, he probably wouldn’t be able to lift his head without breaking his neck.

_7UP_

_7UP_
_7UP_
SevenUP Nov 21, 2014
#6
+95361
0

Good point 7up - i didn't think of that.   LOL

Nov 22, 2014