# 2015 AP Physics 1物理Algebra-Based真题系列之Practice Exam选择题免费下载

### 2015 AP 物理1模考选择题部分免费下载

#### 部分真题预览：

1）In which of the following situations is the kinetic energy of the object decreasing?

1. A sphere is dropped from a building.
2. A satellite is moving in a circular orbit around Earth.
3. A baseball is heading upward after being thrown at an angle.
4. An elevator is moving upward at a constant velocity.

4）A stone of mass m is thrown upward at a 30° angle to the horizontal. At the instant the stone reaches its highest point, why is the stone neither gaining nor losing speed?

1. Because the acceleration of the stone at that instant is zero
2. Because the net force acting upon the stone at that instant has magnitude mg→
3. Because the angle between the stone’s velocity and the net force exerted upon the stone is 90°
4. Because the stone follows a parabolic trajectory and the peak of the trajectory is where the parabola has zero slope

14）Some students want to calculate the work done by friction as an object with unknown mass moves along a straight line on a rough horizontal surface. The students have a force probe, a meterstick, and a stopwatch. Which of the following will allow the students to take the measurements needed to calculate the work done by friction?

1. Pulling the block at an unknown constant acceleration with the force probe for a measured time
2. Pulling the block at an unknown constant speed with the force probe for a measured time
3. Pulling the block at an unknown constant acceleration with the force probe for a measured distance
4. Pulling the block at an unknown constant speed with the force probe for a measured distance