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Science study guide
Terms in this set (14)
Susan is training for the NYC marathon and jogs around Morristown for 13 miles. It takes her 2 hours. What was her speed? Include the formula you are using and units the whole time.
when she was running her constant speed was 6.5 so what is divided distance by time so it would be 13 divided by 2 so she was going at 6.5miles per hour
At 1:00 pm Peter, Juan & Lucas begin their trip. The odometer on the car reads 41,032 miles. At 1:45pm, they stop at McDonalds for fifteen minutes, and the odometer reads 41,104. At 3:00pm, they reach their destination and the odometer reads 41,249. What is their average speed?
average speed = total distance/total time
average speed= 141.249 miles 40.032 miles/2hrs
average speed= 217 m/2hrs
average speed 108.5 m/hrs
Complete the following sentence...A speed of 2 miles/hour means that...
every 60 seconds the object moves 2 miles.
Equal forces acting on an object in opposite directions
Forces that produce a nonzero net force, which changes an object's motion
Mr. Bernal stands on his scale every morning to weigh himself. He wins a NASA contest and is able to travel to our solar system's least massive planet, Mercury.
Would Mr. Bernal's weight be affected?
Why would Mr. Bernal's weight be affected that way?
yes his weight is going to be effected because mercury is the closest thing to the sun the gravity is going to be decrease son its going to be light.
because mercury is the closest spot to the sun his is weight is going to be triple the size of his normal weight so this is why is going to be effected that way
Newton's First Law
An object at rest wants to stay at rest and an object in motion wants to stay in motion, at a constant speed, in a straight line, unless acted upon by an unbalanced force.
Newton's Second Law
An object's acceleration depends on its mass and the force applied. F=m X a
Newton's Third Law
For every force, there is an equal and opposite reaction
According to Newton's First Law of Motion, why is a charging brachiosaurus unable to stop right away? Circle your answer and explain how you know below using Newton's First Law.
a. His feet do not have enough friction with the ground below.
b. His mass is too heavy.
c. He wants to stay in motion.
d. The air is pushing back on him.
According to Newton's Second Law of Motion, if you push a brachiosaurus (a dinosaur with a mass of 8 packed school buses) and a compsognathus (a dinosaur with the mass of a chicken) with the same force, which dinosaur will have a faster acceleration? Explain using Newton's Second Law.
of course the bigger dinosaur is going to have more strength so it's going to pull the compsognathrus everywhere he wants and since the compsognathrus is the size of a chicken it doest have much force to move the bachiosaurus.
According to Newton's third law, how come when a tyrannosaurus runs into a triceratops, the tyrannosaurus bounces backwards? Circle your answer and explain how you know below using Newton's Third Law.
a. Because he is more massive.
b. Because the triceratops applies an equal force to him.
c. Because the tyrannosaurus got scared.
d. Because there wasn't friction to slow him down.
Rebecca and Valeria both want the last pair of Uggs for sale. Rebecca pulls the boots to the left with a force of 20N while Valeria pulls the boots to the right with a force of 20N. Draw a picture to diagram the forces acting on the boots and calculate net force
20n - 20n= 0N
Anthony and Jeremy bought a refrigerator. Anthony starts to push the fridge out of the store with a force of 100N. Jeremy comes to help and pushes with a force of 120N. Draw a diagram of the forces acting on the fridge and calculate net force.
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