Предмет: Физика, автор: Divelor

5. Хлопчик масою М=50 кг, стоячи на ковзанах на льоду, кидає у гор изонтальному напрямку металеву кулю масою m=2 кг зі швидкістю Vk= 5 м/с. На яку відстань відкотиться хлопчик, якщо коефіцієнт тертя дорівнює 0,02?

Ответы

Автор ответа: yroha0013ozm56p

Ответ:

0,1м

Объяснение:

Закон збереження імпульсу:

Mv=mVk

v=mVk/M=2кг×5м/с/50кг=0.2м/с

Використаємо 2 закон Ньютона

Ма=uMg

a=ug=0.02×10м/с²=0.2м/с²

Дане прискорення співнапрямлене із силою тертя, тобто протилежно руху.

S=v²/2a=0.04м²/с²/0.4м/с²=0,1м

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: veronalbz

In the New Zealand children as young as 15 are allowed to get behind the wheel. The reason for this is that many years ago young workers needed to be able to get farms where they worked.
Today, not many 15-year-olds work on farms but the law has never changed. In the USA the minimum driving age in most states is 16. Many people feel this is too young and should be raised a year at least. In the UK you have to wait until you are 17 years old before you are allowed to drive but some people still think this is too young.

Young drivers are considered to be inexperienced and dangerous. However, some parents say their children are safer driving than using public transport. So, is there a right age to start driving?

What's the minimum driving age in your country? Should it be changed?

Something has to be done to reduce the number of young people who are killed and injured on our roads. I believe that the driving age should be 18 so that new drivers are more mature. It will also mean that all drivers are adults in the eyes of the law. Robert Hood, Philadelphia, USA.

I agree that we need to do something to make our roads safer. However, I believe that we need to improve the way we teach all new drivers, not just the young ones. The minimum age could be lowered to 16 but drivers would have to complete at least a year of lessons before taking their test and being allowed to drive alone. Vera Cotter, Walverhampton, UK

1. Complete the sentences.

1. In___ you can become a driver if you are 15 years old.

2. In___ you can drive at the age of 16.

3. You can drive a car in the UK at the age of___.

4. Robert Hood, thinks people should be allowed to drive at the age of__.

5. Vera Cotter thinks new drivers should only take their test after___of lessons.

2 года назад

Предмет: Қазақ тiлi, автор: d03943820

поздравление на 9 мая написать на казахском короткое пж!!!

2 года назад

Предмет: География, автор: strilkovanadia

Назвіть найбільш теплі й холодні течії в Антлантичному океані

2 года назад

Предмет: Математика, автор: xiaomi150517

найти значение выражения -8 * (одна восьмая минус одна четвёртая игрик) - 3 * (1 минус две целых одна третья игрик), если игрик равен одна целая пять восьмых
Заранее спасибо

8 лет назад

Предмет: Биология, автор: CronderX

Чим відрізняється трубчастий гриб від пластинчастого?
ПРАВИЛО!!!

8 лет назад