Physical Quantities in Kinematics

Position means

• 位置

• 速度

• 位移

• 加速度

Displacement is change in __ .

Distance means

• 位移

• 距离

• 速度

• 加速度

True or False: The difference between distance and displacement is that distance is a vector whereas displacement is a scalar.

• True

• False

Velocity means

• change in postion

• change in time

• speed

• change in position per unit of time

True or False: The car's speed is 30 m/s to the east!

• True

• False

Acceleration means

• Change in postion

• Change in velocity per unit of time

• speed

Deceleration means

• Acceleration in the negative direction

• Speed up

• Slow down

Initial means

• 初始

• 末尾

• 总和

• 平均

Time interval means

• a particular instant

• beginning instant

• a period of time

• last instant