Explanation:
Mass of boy = 40 kg
Mass of box = 20 kg
Total mass = 60 kg
Initial potential energy = 0 (since height would be 0 initially)
Final potential energy = mgh
Taking g as 10 m/s²,
=> 60 × 10 × 15
= 9,000 J
So, work done = final potential energy - initial potential energy
= 9,000 J
Power = Work/Time
=> Power = 9000/25
=> Power = 360 J/s
or 360 watt.
Answer:
(4,11) not answer for the first one
but correct answer for the second
Step-by-step explanation:
Answer:
70
Step-by-step explanation:
The answer is -9x
If you want explanation let me know!
I didn't provide one since you said ''What is the result''
Answer: They are similar in that when you multiply 2 fractions, you merely multiply the numerators together and the denominators together they are different in that a division still remains once the multiplication is completed.
Step-by-step explanation: ^