Question

please help me please help me please help me please help me ​

Answer 1

Answer:

ok i am 7th class

but i know all passages

now answers are here,

Explanation:

19.1 b

19.2 c

19.3. c

19.4. d

Answer 2

Explanation:

1) muscular energy is converted to kinetic energy

2) total mechanical energy remain constant

3) Elastic potential energy

4)joule