man pushes a box through 10 metre along a horizontal surface by applying a force of 20 Newton in the same direction with and left the box through height of 2 metre to play set on a rock the mass of the box is 20 kg and the entire operation takes 3 minutes and 20 seconds find the total work done by him and the power developed by him
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Answer:
Newton’s second law of motion is closely related to Newton’s first law of motion. It mathematically states the cause and effect relationship between force and changes in motion. Newton’s second law of motion is more quantitative and is used extensively to calculate what happens in situations involving a force. Before we can write down Newton’s second law as a simple equation giving the exact relationship of force, mass, and acceleration, we need to sharpen some ideas that have already been mentioned.
First, what do we mean by a change in motion? The answer is that a change in motion is equivalent to a change in velocity. A change in velocity means, by definition, that there is an acceleration. Newton’s first law says that a net external force causes a change in motion; thus, we see that a net external force causes acceleration.