As a block slides down a frictionless incline, which of the following statements is true?
A: Both its speed and acceleration increase.
B: Its speed and acceleration remain constant.
C: Its speed increases and its acceleration remains constant.
D: Both its speed and acceleration decrease.
E: Its speed increases and its acceleration decreases.
F: None of these.
A: Both its speed and acceleration increase.
B: Its speed and acceleration remain constant.
C: Its speed increases and its acceleration remains constant.
D: Both its speed and acceleration decrease.
E: Its speed increases and its acceleration decreases.
F: None of these.
举一反三
- For a point on a spinning disc in uniform circular motion, which of the following is not constant? A: It's angular speed B: It's angular acceleration C: It's centripetal acceleration D: The magnitude of it's total acceleration E: None of the others
- Which shallow water effect will increase dramatically if you increase your ship’s speed past its critical speed?
- The strength of waterway transport does not rest on its speed, but on its capacity and continuity of its traffic.
- China is trying its best to speed up its (economy) ______ development.
- This beautiful city me deeply with its high speed of development