Write the difference between Rotational K. E and linear K. E​

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire