Centripetal acceleration is described as the characteristic of the motion in which an object moves in a circular path. Any object that transverses in a circular path with an acceleration vector directed towards the centre of that circle is called centripetal acceleration.

Acceleration can be measured in metres per second.

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## Important Centripetal Acceleration Questions with Answers

**1. Centripetal force is the force acting towards the _____ of the circular path.**

**Sides****Centre****Edges****None of the above**

Answer: b) Centre

Explanation: The centripetal force is the force acting towards the centre of the circular path.

**2. Centripetal force is given by the formula: **

- \(\begin{array}{l}F={mv^{2}}+{r}\end{array} \)
- \(\begin{array}{l}F=\frac{mv}{r}\end{array} \)
- \(\begin{array}{l}F=\frac{4}{mv^{2}}\end{array} \)
- \(\begin{array}{l}F=\frac{mv^{2}}{r}\end{array} \)

Answer: d)

Explanation: Centripetal force formula is given by the formula

**3. Turning a car is an example of _______.**

**Oscillatory motion****Air resistance force****Linear motion****Centripetal force**

Answer: d) Centripetal force

Explanation: Turning a car is an example of centripetal force. Due to the friction between the road and tyres, the centripetal force causes the car to turn in a circular path.

**4. Acceleration is the change in _____.**

**Distance****Displacement****Velocity****None of the above**

Answer: c) Velocity

Explanation: Acceleration is the change in velocity.

**5. The unit of centripetal acceleration is ______.**

**m.s**^{-2}**m.s**^{2}**m.s****m**^{-2}.s

Answer: a) m.s^{-2}

Explanation: The unit of centripetal acceleration is** **m.s^{-2}.

**6. The centripetal acceleration dimensional formula is ______.**

**M**^{2}L^{1}T^{0}**M**^{0}L^{1}T^{-2}**M**^{2}L^{2}T^{0}**M**^{0}L^{1}T^{-1}

Answer: b) M^{0}L^{1}T^{-2}

Explanation: The centripetal acceleration dimensional formula is** **M^{0}L^{1}T^{-2}.

**7. Choose the right answer: The centripetal acceleration and the centripetal force have the same direction.**

**YES****NO**

Answer: a) YES

Explanation: Both centripetal acceleration and centripetal force possess the same direction.

**8. State true or false: Gravitation is the main force for the planets to orbit around the Sun.**

**True****False**

Answer: a) True

Explanation: Gravity is responsible for the motion of planets around the Sun.

**9. Acceleration can be measured in _____.**

**Metres per second****Watts second****Metres****Joules per second**

Answer: a) Metres per second

Explanation: Acceleration can be measured in metres per second.

**10. Centripetal indicates towards the _____.**

**Right side****Left side****Bottom****Centre**

Answer: c) Bottom

Explanation: The force which is responsible for the centripetal acceleration is directed toward the centre and hence the name centripetal force.

### Practice Questions

- Define centripetal acceleration.
- What is the dimension formula of velocity?
- Give the centripetal acceleration formula.
- What is gravitational force?
- What is the unit to measure the velocity?