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MDCAT
Physics
2021

Physics · Circular Motion & Momentum

Work through this past-paper style MCQ, then read the full explanation. Practice more physics questions on mMCQ with adaptive practice and topic analytics.

Question

The acceleration is 4 when:

Options
  • A

    alpha=2, r=2

  • B

    alpha=4, r=4 

  • C

    alpha=3, r=0

  • D

    r=0, alpha=0

Explanation

The acceleration of an object can be determined using the equation

a = r × alpha

where r is the radius of curvature and alpha is the angular acceleration.

In option A, with alpha = 2 and r = 2, we can calculate the acceleration as follows:

a = r × alpha

a = 2 × 2

a = 4

Therefore, the acceleration is 4 when alpha = 2 and r = 2, which corresponds to option A.

This option is correct.

The acceleration of an object can be determined using the equation

a = r × alpha

where r is the radius of curvature and alpha is the angular acceleration.

In option A, with alpha = 2 and r = 2, we can calculate the acceleration as follows:

a = r × alpha

a = 2 × 2

a = 4

Therefore, the acceleration is 4 when alpha = 2 and r = 2, which corresponds to option A.

This option is incorrect. 

The acceleration of an object can be determined using the equation

a = r × alpha

where r is the radius of curvature and alpha is the angular acceleration.

In option A, with alpha = 2 and r = 2, we can calculate the acceleration as follows:

a = r × alpha

a = 2 × 2

a = 4

Therefore, the acceleration is 4 when alpha = 2 and r = 2, which corresponds to option A.

This option is incorrect. 

The acceleration of an object can be determined using the equation

a = r × alpha

where r is the radius of curvature and alpha is the angular acceleration.

In option A, with alpha = 2 and r = 2, we can calculate the acceleration as follows:

a = r × alpha

a = 2 × 2

a = 4

Therefore, the acceleration is 4 when alpha = 2 and r = 2, which corresponds to option A.

This option is incorrect. 

The acceleration of an object can be determined using the equation

a = r × alpha

where r is the radius of curvature and alpha is the angular acceleration.

In option A, with alpha = 2 and r = 2, we can calculate the acceleration as follows:

a = r × alpha

a = 2 × 2

a = 4

Therefore, the acceleration is 4 when alpha = 2 and r = 2, which corresponds to option A.

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Tagged under Physics · Circular Motion & Momentum · 2021