初二下物理试题(国外英文资料).docVIP

初二下物理试题(国外英文资料) 1 all objects are always held and this is Newtons first law. 2, as shown in figure 100, the car of cattle in a smooth horizontal plane to do uniform linear motion, then the car in the horizontal direction of the thrust is. And please draw the diagram of the force in the drawing. 3, boxing heavy athletes with 2000 cattle force, 1600 cattle barbell over the top of the head, when the barbell is the resultant force, the direction of force. 4, the quality of 10 tons of cars in uniform motion in a straight line if its resistance is 0.02 times the weight of the car, then the automobile traction is cattle, face support is the cattle car. 5, 100 meters race, athletes arrive at the end of the race can not stop immediately, this is because the athletes to maintain the state, continue to move forward. 6, on the same indoor floor, to promote heavy furniture than to promote light furniture, this is because heavy furniture to the ground pressure than light furniture, push heavy furniture when it and the ground friction is big. 7, the quality of 50 kg of people stand on the ground pressure of 3 x 104 PA, then he walked on to the pressure for PA. 8, climbers at different heights A, B two, respectively, measured atmospheric pressure of 8.5 * 104 PA and 7.8 * 104 PA, then A height than B height, A water boiling point than B. (fill in above high or low) 9, a submarine under water by the water pressure of 1.96 * 105 PA, it is the depth of PA, if it was to dive 10 meters, water pressure is the PA, if it level 10 metres forward, it is by the water pressure is. The 10 and 1 standard atmospheric pressure is equivalent to centimeters high. The mercury column pressure is equal to pa. 11, on the horizontal surface, when a brick is placed vertically, the ground pressure is F1, the earth pressure is P1, the lateral pressure is F2, the earth pressure is P2, then F1_, F2, _P1_, P2 (fill in or =) 12, 50 cattle body hanging up in uniform below the balloon, the object is expected