物理书卷（Physical scroll）.docVIP

物理书卷（Physical scroll） Jiangsu Guannan 2 09-10 school year second semester final exam Physics (Physics) First, individual choice (4 * 5=20 points) 1, Galileo in the famous slope experiment, let the small ball along the different angles, small resistance of the inclined plane from static start rolling down, through experimental observation and logical reasoning, get the correct conclusion has () When the A. angle is fixed, the displacement of the ball on the inclined plane is proportional to the time When the angle of B. is constant, the speed of the ball on the slope is proportional to the time When the C. slope is constant, the speed of the ball from the top to the end is independent of the tilt angle When the length of the D. slope is constant, the time required for the ball to roll from the top to the end is independent of the inclination angle 2., a plane in the upper air from west to East in horizontal direction to do uniform acceleration flight, the aircraft at the same time drop an object, a total of 6 objects were dropped (excluding air resistance). The following figure shows the position of 6 airdrop objects observed at some point on the ground, of which the correct is () 3. The acceleration of car is an important index to measure the acceleration performance of a car. In recent years, some senior car designers on car acceleration at the same time, put forward a new concept, called the acceleration rate of change, the rate of change of acceleration of this new concept to describe the car acceleration with time change speed. The smaller the acceleration change rate is, the more comfortable the passenger feels. Of the following four units, the units that are suitable for the rate of acceleration change are: () A. B. C. D. 4. trampoline has the name of air ballet. At the Ninth National Games held in Guangdong, trampoline was included in the official competition for the first time. In considering air resistance, athletes began to fall to be back in the process o