---

Question 1:

What is the direction of the centripetal acceleration for an object moving in uniform circular motion?

A) Tangential to the circular path.
B) Radial, towards the center of the circular path.
C) Opposite to the direction of motion.
D) It depends on the speed of the object.

Show Answer

Explanation: The correct answer is B) Radial, towards the center of the circular path. The centripetal acceleration of an object moving in uniform circular motion is always directed towards the center of the circular path. It keeps the object moving in a curved path instead of a straight line.

---

Question 2:

What provides the centripetal force required for an object to move in uniform circular motion?

A) Gravity
B) Friction
C) Normal force
D) Tension in a string or rope

Show Answer

Explanation: The correct answer is D) Tension in a string or rope. In uniform circular motion, the centripetal force required to keep an object moving in a circular path is provided by tension in a string or rope when the object is attached to it. For example, in the case of a swinging pendulum, the tension in the string provides the centripetal force.

---

Question 3:

What happens to the centripetal acceleration of an object if its speed is doubled while moving in uniform circular motion?

A) It doubles.
B) It becomes four times.
C) It remains the same.
D) It depends on the radius of the circular path.

Show Answer

Explanation: The correct answer is C) It remains the same. The centripetal acceleration of an object moving in uniform circular motion is independent of its speed. It depends only on the radius of the circular path and can be calculated using the formula a = v^2 / r, where v is the speed and r is the radius. Doubling the speed does not change the radius, so the centripetal acceleration remains the same.

---

Question 4:

Which of the following statements is true about the net force acting on an object in uniform circular motion?

A) The net force is zero.
B) The net force is directed towards the center of the circular path.
C) The net force is directed tangential to the circular path.
D) The net force depends on the mass of the object.

Show Answer

Explanation: The correct answer is B) The net force is directed towards the center of the circular path. In uniform circular motion, the net force acting on an object is always directed towards the center of the circular path. This net force is responsible for the centripetal acceleration that keeps the object in circular motion. The net force is not zero and is not directed tangential to the circular path.

---

Question 5:

What is the relationship between the radius of the circular path and the centripetal acceleration of an object in uniform circular motion?

A) Directly proportional
B) Inversely proportional
C) No relationship
D) It depends on the speed of the object.

Show Answer

Explanation: The correct answer is B) Inversely proportional. The centripetal acceleration of an object in uniform circular motion is inversely proportional to the radius of the circular path. The relationship can be described by the formula a = v^2 / r, where a is the centripetal acceleration, v is the speed of the object, and r is the radius of the circular path. As the radius increases, the centripetal acceleration decreases, and vice versa.