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Donald Trump has a mass of 108 kg, calculate his height when he is at the following heights (g=9.81 N/kg):
a) 20 J b) 1050 J c) 150 kJ
d) 120 J e) 2000 J f) 57 J
g) 1200 J h) 1 kJ i) 92 kJ

Sagot :

hinnocentholumede

Answer:

(a)

Q=mgh

20=108×9.81×h

20=1059.48h

divide both side by 1059.48

h= 20/1059.48

h=0.02

(b)

1050= 108×9.81×h

1050= 1059.48h

h=1050/1059.48

divide both side by 1059.48

h=0.99

repeat the remaining following and check the answers

(c) h=0.14

(d) h=0.11

(e) h=1.89

(f) h= 0.05

(g) h=1.13

(h) h=0.94

(i) h= 86.84

note the (h) and (i) you need to change the kj to j by multiple by 1000

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