The relationship between speed and time of uniform speed change linear motion The object starts to move in a straight line with uniform acceleration of 1 m / S ^ 2 from its rest. After 4 seconds, the acceleration becomes 0.5 m / S ^ 2, and the direction is still the same as the original. Please make its V-T image within 8 seconds Note: it's best to make an image. If it's not convenient, you can describe how to do the following and the relevant quantity in specific language

The relationship between speed and time of uniform speed change linear motion The object starts to move in a straight line with uniform acceleration of 1 m / S ^ 2 from its rest. After 4 seconds, the acceleration becomes 0.5 m / S ^ 2, and the direction is still the same as the original. Please make its V-T image within 8 seconds Note: it's best to make an image. If it's not convenient, you can describe how to do the following and the relevant quantity in specific language

Because the object is accelerating uniformly, the V-T image is a straight line, VT = V0 + at. After 4 seconds, the object's velocity becomes at = 1 * 4 = 4m / s, and then the acceleration becomes 0.5m/s ^ 2. After 4 seconds, the velocity becomes V0 + at = 4 + 0.5 * 4 = 6m / s. take X-axis as time and y-axis as velocity, establish a rectangular coordinate system, and then make a pass (0,0) point first