Solved numerical problems If a body moving on a straight line with the velocity of 10 mls and it changes
its velocity to 20 m/s in 2 seconds, what is its acceleration?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

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How can you increase the strength of an electromagnet?