Van Hau's shot was included in the semester exam
The first semester Physics test for grade 10 at An Duong High School (An Duong district, Hai Phong) requires testing knowledge through a hypothetical situation about a shot by player Doan Van Hau.
Recently, 10th grade students of An Duong High School (Hai Phong City) took a Physics semester test with a special question when presenting a situation related to player Doan Van Hau's shot during a practice session preparing for the men's football final at the 30th SEA Games.
Specifically, the situation is given in a training session preparing for the final match of the 30th SEA Games, player Van Hau kicks a ball weighing m=220 g that is standing still on a flat horizontal field, the contact time between the foot and the ball is 0.2 seconds, the ball moves on the field at a speed of 10m/s.
The exam requires students to:
a. Calculate the acceleration of the ball and the force Van Hau exerted on the ball.
b. After Van Hau kicked the ball, it rolled 10 meters and then stopped. Calculate the frictional force of the field acting on the ball. Ignore air resistance.
c. Suppose when the ball is moving on the field with a speed of 10m/s, it collides with another ball with a mass m2=100g, after the collision it bounces back in the same direction with a speed of 4m/s. Find the speed of the ball with a mass m2=100g immediately after the collision.
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| Doan Van Hau. Photo: Quyet Thang |
Teacher Huy said that he realized the students' interest in the men's football final match of the 30th SEA Games, so he included a football-related situation that also tested knowledge in the exam.
According to Mr. Huy, it is just a hypothetical situation, instead of putting objects A and B in motion, he replaced it with Doan Van Hau's kick. When teaching and testing, he also often brings in real-life situations for students to associate and apply within the framework of the allowed knowledge content.
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| Doan Van Hau. Photo: Quyet Thang |
Doan Van Hau (born April 19, 1999, from Thai Binh) is a player who grew up at the training center of Hanoi Football Club. He is currently playing for SC Heerenveen club as a defender.
Van Hau was called up to the Vietnam national team when he was only 18 years old and became the youngest player on the Vietnam team in 2017.
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