# Science Motion and Forces Chapter 3

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1. A statement that describes the effect of movement on fluid pressure.  According to this principle an increase in the speed of the motion of a fluid decreases the pressure with in the fluid.
Bernoulli's principle
2. The upward force on objects in a fluid.
buoyant force.. buoyancy
3. The elliptical path one celestial body follows around another celestial body.
orbit
4. The friction due to air.
air resistance
5. A property of matter representing the mass per unit volume.
density
6. Machines that use liquid to transmit or increase a force.
hydraulics
7. A substance that can flow easily such as a gas or liquid.
fluid
8. The statement that says that when an outside pressure is applied at any point to a fluid in a container that pressure is transmitted throughout the fluid with equal strength.
Pascal's principle
9. The force of gravity on objects.
weight
10. A force that resists the motion between two surfaces in contact.
friction
11. Called g and is equal to 9.8m/s2 at earths surface
acceleration due to gravity
12. A measure of how much force is acting on a certain area.  How concentrated a force is.
pressure.... pressure is equal to the force divided by the area.
13. The force that objects exert on each other because of their masses.
gravity
14. On what two things does the strength of the gravitational force between two objects depend.
mass and distance
15. What would happen to gravitational pull if two planets were to drift apart from each other.
The gravitational pull would decrease
16. Compare the fall of an object that is dropped to that same object that is thrown forward.
They both fall at the same rate.. doesn't change its downward acceleration.
17. A person weighs himself on
Earth and the moon. How is their weight and mass affected?
The mass stays the same but the weight would be less on the moon because Earth has a greater pull than the moon.
18. How are friction and air resistance similar.
They both resistance motion
19. What happens to the frictional force to an object when you push it?
Once you over come the friction the friction force remains constant.
20. How do you increase the friction between two objects?
Double the force... use two hands
21. What does terminal velocity have to do with a skydiver?
How fast he falls
22. Why is artificial gravity hard to create?
.....
23. What is space adaption syndrome?
24. What does space adaption syndrome cause?
dizziness and sickness
25. Explain Bernoulli's principle....
A statement that describes the effect of movement on fluid pressure.  According to this principle an increase in the speed of the motion of a fluid decreases the pressure with in the fluid.
26. How can you apply Bernouli's principle to water flowing through pipes?
the faster the fluid the less pressure on the pipes.
27. How do you apply Bernoulli's principle to airplane wings?
Air flowing over the wing is faster than air flowing under the wing.   This allows the plane to lift easier.
28. What happens to the force that is applied to a hydraulic jack?
it increases
29. Explain Pascal's principle
The statement that says that when an outside pressure is applied at any point to a fluid in a container that pressure is transmitted throughout the fluid with equal strength.
30. How is buoyance related to density?
The less dense the more buoyant
 Author: Scottj ID: 196747 Card Set: Science Motion and Forces Chapter 3 Updated: 2013-01-31 01:12:29 Tags: motion forces Folders: Description: chapter 3 Show Answers: