A kid on a trampoline has 1,000 J of potential energy when they are at the top of a jump. How much kinetic energy will the kid have when they come halfway down? A. 100 J

B. 250 J

C. 500 J

D. 1000 J

C. 500 J

Explanation:

Given;

potential energy of the kids at the top of the trampoline, P.E = 1,000 J

⇒At the top of the trampoline, the kids have only potential energy.

⇒On half way down, the kids have both kinetic energy and potential energy.

⇒At the bottom of the trampoline, the kids have only kinetic energy.

Based on the statements above, the kinetic energy of the kids half way down is calculate as;

P.E +  K.E = 1000 J

Base on law of conservation of energy,  P.E = K.E

2 K.E = 1000 J

K.E = ¹/₂ x 1000 J

K.E = 500 J.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

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