When a footballer collides with the goal post, the forces at work are the action and reaction forces. The player will exert an action force on the goal post, and then a reaction force from the goal post will stop the player. The reaction force call will cause pain and even injury to the player.
Answer:
C) 40,000 Joules
Explanation:
½(1000)10² - 10000 = 40000
Answer:
Here, force=20N and displacement=10m
Work=Force×Displacement=20N×10m=200Nm
THE INTERSTELLAR MEDIUM COMPOSED GAS AND DUST
<span> The box is exerting a force of its weight. So we'll use W=mg (Note: you can use the notation F=ma, doesn't matter since weight IS a force.) We can call g negative since it's directed down towards the earth.
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<span>W = 5kg(-9.8 m/(s^2)) = -49 N
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<span>Thus, the box exerts a force of 49N downwards. </span>