Pertanyaan
Benda dengan massa 2 kg dilempar vertikal ke atas dengan kecepatan awal 20 m/s. Jika g = 10 m/s², maka energi potensial benda saat mencapai titik tertinggi adalah....
A: 300 J
B: 400 J
C: 500 J
D: 600 J
E: 700 J
Jawaban
Dalam menyelesaikan masalah ini, kita perlu memahami konsep energi kinetik dan energi potensial gravitasi. Pada saat benda dilempar ke atas dengan kecepatan awal dan akhirnya mencapai titik tertingginya, seluruh energi kinetiknya berubah menjadi energi potensial gravitasi.
Energi Kinetik (Ek) = 0.5 * m * v^2
Energi Potensial Gravitasi (Ep) = m * g * h
Ketika benda mencapai titik tertingginya, kecepatannya menjadi 0, sehingga seluruh energi kinetiknya berubah menjadi energi potensial.
【Deskripsi】
Langkah 1: Hitung energi kinetik awal benda saat dilempar ke atas.
Ek = 0.5 * m * v^2
Ek = 0.5 * 2 kg * (20 m/s)^2
Ek = 0.5 * 2 * 400
Ek = 400 J
Langkah 2: Pada titik tertinggi, seluruh energi kinetik berubah menjadi energi potensial. Oleh karena itu, energi potensial benda saat mencapai titik tertinggi adalah sama dengan energi kinetik awalnya.
Ep = 400 J
Oleh karena itu, jawabannya adalah B: 400 J.
Pertanyaan Panas
lebih
Marla: Have ever ridden a camel? Tania: Yes, I have. Marla: When...? Tania: Two years ago during my umroh travel. The best completion to the blank ab
My mother and I ... chicken soup for my sister's birthday party last week. What is the best expression to fill in the blank? A. Cook B. Cooks C. Cooke
Although I looked in every pocket and my drawer..., I wondered I lost them. A. I have got my keys. B. I was getting my keys. C. I had found my own key
What does Zafria probably feel when reading the letter? Proud Happy Amused Amazed Unhappy
5. My friends badminton in a field. (play) 6. My cat ten sausages in a day. (eat) 7. My family every Sunday for a family dinner. (meet) 8. The waitres
5. Which suggestion is match with the picture below? a. I recommend that you sleep after eating all of the food. b. I strongly advise you to control y
Error Analysis. Please fix the incorrect word. Does your mother cooks in the kitchen?
Which does one of following sentences show an achievement? A. He has won 5 gold medals in the olympic game. B. She has done her homework today. C. The
He happily announced that his team won the game. What is the adverb of manner of the sentence?
In Festival General Updates, the word mentioned is closest in meaning to... Spoken Notified Acknowledged Cited
What is the best Pronoun to fill in the blank. We like our teacher. name is Risa.
the money, he left. A. Had received B. Have received C. Had been received D. Has received E. Having received
Father was so happy about his promotion ... he promised to take us to an expensive restaurant. A. Until B. When C. Although D. That E. Since
Choose the most appropriate question words to complete the question! died in the explosion in Beijing? Nearly 4000 people.
Choose the most appropriate question words to complete the question! is your sister? She is eleven.