collinv2323 collinv2323

14-03-2020
Physics

contestada

Trevor lifts a 10kg box to the top of a cliff which is 20m high, in half an hour, then drops the box over the cliff. How much power did he use to lift the box?

Respuesta :

Danboghiu66 Danboghiu66

14-03-2020

Answer:

P=1.11Watts

Explanation:

Mass if box: m=10kg

Height: h=20m

g=10m/s²

Duration of action: t=30min=1800s

Work to lift the box:

W=m×g×h=10×10×20=2000J

Power: P=W/t=2000/1800=1.11Watts

Answer Link

Otras preguntas

Thoughts on how the Johannesburg community corrections help Soweto's autistic learners.

Occupational Outlook Handbook is a resource that O explains what education is needed for a job O provides contact information for job shadowing O shows the loca

Factorise this expression as fully as possible 12x^3 - 9x^2

Esperanza is helping her aunt bag apples to sell at the market. They have 98 apples and they want to put 14 apples in each bag. How many full bags of apples wi

Calculate the ratio of H ions to OH– ions at a pH = 7. Find the concentration of H ions to OH– ions listed in Table B of your Student Guide. Then divide the H c

We have two containers with an identical amount of gas in each. One gas is helium, the other is ammonia. Which would you expect to have the higher pressure?

Fekru knows that when his teacher pours water from a small, wide glass into a tall, thin glass, the amount of water remains the same even though the tall, thin

What do the peach blossoms symbolize in this story? explain how this symbol contributes to the overall mood.

pls help me worth 30 points

Please answer the question in the picture