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Physics 150
Exam 1
Question | Answer |
---|---|
What did Galileo discover in his legendary experiment on the Leaning Tower of Pisa? | Galileo found that a heavier stone does not fall significantly faster than a lighter one. |
What did Galileo discover about moving bodies and force in his experiments with inclined planes? | In the absence of a retarding force, a body will keep moving at a constant speed in a straight line forever. |
What type of path does a moving object follow in the absence of a force? | It continues to move in a straight line at a constant speed. |
What is the net force on a bag pulled down by gravity with a force of 18 newtons and pulled upward by a rope with a force of 18 newtons? | The net force is zero newtons. |
When you stand at rest on a bathroom scale, how does your weight compare with the support force from the scale? | Your weight is equal in magnitude and opposite in direction to the support force from the scale. |
A different scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The reading in the left scale is 800 N. What is the reading in the right-hand scale? | T=500N |
Lucy Lightfoot stands with one foot on one bathroom scale and her other foot on a second bathroom scale. Each scale reads 335 N .What is Lucy's weight? | W=670N |
Henry Heavyweight weighs 1450 N and stands on a pair of bathroom scales so that one scale reads twice as much as the other.What are the scale readings? | W1,W2=967,483N |