How far to reach the target with a solid ball

The PE teacher who recorded the highest meter of solid ball taught on the spot.

At present, the high school entrance examination is a regional examination, which is organized and conducted in large cities. The items and requirements of the physical education examination also vary according to the regulations of each municipal bureau. At present, the sports projects of Jiangsu Provincial High School Entrance Examination are roughly as follows:

Middle school students broadcast drills (the largest proportion of scores), ball games (boys' basketball and girls' volleyball), track and field (50 meters), rope skipping, etc. The choice of any school.

The physical education examination is generally arranged from April to mid-May, and the specific time is determined by each district and county, and students can focus on practicing before the examination according to the specific schedule and options of the district and county. The content of the test is divided into individual compulsory items, individual limited items and randomly selected items by district and county. 1. Individual compulsory items:

Male: 1000m run, Female: 800m run; 2. Individual limited items:

Male: horizontal bar pull-ups or throwing a solid ball, female: sit-ups or throwing a solid ball; 3. Randomly selected projects by districts and counties:

The first category is field classics, the second category is gymnastics, the third category is ball games, and the fourth category is martial arts.

The maximum score for each individual is 10 points, and the total score for the physical education test is 30 points. The total score of the physical education examination shall be recorded in the total score of the candidate's senior secondary school entrance examination. Students who are exempted from physical education classes for a long time due to disability, injury, or illness and are unable to participate in physical education examinations may apply for exemption from physical education.

The evaluation of its results is divided into two categories: 1. Exempt candidates who have lost their ability to exercise due to disability and are not the subject of participating in the physical education examination will record the physical education examination results with a full score of 30 points; 2. If a person is exempted from physical education classes for a long time due to injury or illness and is unable to participate in the physical education examination, the physical education examination results shall be recorded as 60% (18 points) of the total score of the physical education examination. 2007 Zhengzhou Junior High School Graduates Entrance Examination Scoring Criteria.

Ninth grade girl.

800 meters (minutes and seconds).

Score 5 6 7 Grade above Score 8 9

Score below 10 standing long jump (cm).

Score 5 6 7

Score 141 or less 142 147 148 153 154 159 160 165 166 171 Score 8 9 10

Score 172 177 178 183 184 189 190 195 196 and above.

Basketball dribbles in seconds between moves

Score 5 6 7

Grades above.

Score 8 9

Score value 10 below the score According to the specific standards of the physical education examination issued by Beijing ** a few days ago, this year, the "pull-up" scoring standard in the men's limited selection event has been adjusted from 1 1 point to 3 6 points, and 10 points are full scores. In the random test items, the scoring standard of "volleyball two-handed cushion ball" has been adjusted from 1 1 point to 3 6 points and 10 points of 10.

1) After thinking about it, Xiao Ming believes that the distance of the solid ball throwing may be related to the speed of the movement of the solid ball when it is just out of hand, the angle of the horizontal ground and the height of the ground, which belongs to the hypothesis and conjecture of the experiment;

2) As can be seen from the figure, under the condition of keeping the speed of the ball out of the hand, the distance of the throwing angle is changed, and the distance of the shooting range is different, which shows that the distance and width of the solid ball throw are purely related to the size of the projectile angle;

3) To ** the relationship between the injection distance and the height of the injection point, keep the elevation angle and injection speed unchanged, change the height of the injection point many times, and measure the distance of each injection, Group B: Let a student stand on the platform at different heights for throwing experiments, so as to ensure that the speed of the solid ball is the same, the angle of the horizontal ground is the same, and the height of the injection point is quite different, and the phenomenon is obvious; Group A: Let two students with different heights carry out the throwing experiment, it is not guaranteed that the speed of the solid ball is the same, the angle is the same as that of the horizontal ground, and the height of the shooting point is not much different, and the phenomenon is not obvious, so the group B experiment is more reasonable;

Under the condition that the speed of movement of the solid ball and the angle of the horizontal ground remain unchanged, the higher the throwing point is from the ground, the greater the distance of the solid ball throwing

Therefore, the answers are: (1) hypotheses and conjectures; (2) The angle at which the ball is level with the ground when the solid ball just comes off and the hand is missing; (3) b, let a student stand on a platform at different heights to carry out the throwing experiment, so as to ensure that the speed of the solid ball is the same, the angle of the horizontal ground is the same, and the height of the shooting point is quite different, and the phenomenon is obvious; When the solid ball is out of your hand, the supporting leg should be straight, the waist should be straight, and the arms should be stretched forward