Question 2: Work, Energy and Power & Circular Motion

Question

An electron is moving in a circle of radius
2m with speed of 4 m/s. Find the
acceleration of the electron.

Accepted Answer

Given, radius of circular path, $$r=2 \mathrm{~m}$$
Speed of circular path, $$v=4 \mathrm{~m} / \mathrm{s}$$
Acceleration of electron moving on circular path with constant speed is equal to centripetal acceleration.
$$	herefore$$ Acceleration of electron $$(a)=$$ Centripetal acceleration
$$a=\frac{v^2}{r}=\frac{4^2}{2}=8 \mathrm{~m} / \mathrm{s}^2$$

Answer

8 m/s$$^2$$

Answer

4 m/s$$^2$$

Answer

16 m/s$$^2$$

Answer

10 m/s$$^2$$

Work, Energy and Power & Circular Motion

An electron is moving in a circle of radius 2m with speed of 4 m/s. Find the acceleration of the electron.

Choose the correct answer: