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chocolatelover1993

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  • physics...please help!!!!!!!!!?

    Ok, I am very nervous and worried because I don't get any of this stuff...It's all about forces...I need lots of help and any help is greatly appreciated. Thanks in advance.

    1. As a ball falls, consider on force to be the pull of the earth on the ball. What is it's pair force?

    2. You push your lawnmower (15kg) across the lawn at constant speed. To do so you must exert 120 N of force. The handle makes a 35 degree angle with the horizontal.

    a) Draw a force diagram. (But can you explain in which direction forces are going in, why and the magnitude?

    b) Find the x component of the force applied

    c) How does this compare to the frictional force which opposes your effort? Explain.

    d) What is the value of the normal force?

    3. A person pulls on a 50 kg desk with a 200N force acting at a 30 degree angle above the horizontal. The desk doesn't budge.

    a) Write the equation that describes forces that act in the x-direction.

    b) Write the equation that describes forces that act in the y-direction.

    c) Determine the x and y components of the force of tension.

    d) Determine the value of the frictional force and the normal force.

    Again, any help is GREATLY appreciated....thanks once again.

    2 AnswersPhysics1 decade ago

  • Physics help???????????????

    Can someone explain what the terms velocity and acceleration are? And my teacher said something about the derivative of acceleration being speed or something like that...He didn't really explain it that well. And somehow all of these go together..Could someone please explain that to? I just don't seem to get this stuff...And, I know what a derivative is so you don't have to explain that.

    Thanks a million in advance.

    2 AnswersPhysics1 decade ago

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