Question

60 pOINTS HELP PLEASE 4. A 20-kg child is tossed up into the air by her parent. The child is 2 meters off the ground traveling 5 m/s.

Circle one: KE / GPE / both

Show your work for finding the values of each type of energy the object has:

Answer 1

K.E=0.5mv^2
GPE=mgh
The child has both K.E and GPE
$ke = 0.5 \times 20 \times {5}^{2} \\ ke = 10 \times 25 \\ ke = 250 \: joules$
$gpe = 20 \times 9.81 \times 2 \\ gpe = 40 \times 9.81 \\ gpe = 392.4 \: joules$
g is taken as 9.81