Book M Ch 2 Test
29 Questions
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Questions and Answers
- 1.Who was the scientist who gave us the Laws of Motion?
- A.
Bill Nye
- B.
Aristotle
- C.
Sir Isaac Newton
- D.
Fig Newton
- 2.How many Laws of Motion are there?
- A.
1
- B.
2
- C.
3
- D.
4
- 3.What is another name for the first law of motion?
- A.
Law of inertia
- B.
Action/reaction
- C.
Accleration=Net force/mass
- 4.Which law explains why we need to wear seatbelts?
- A.
1st
- B.
2nd
- C.
3rd
- 5.Which law says that force is equal to mass times acceleration (Fnet=MA)?
- A.
1st
- B.
2nd
- C.
3rd
- 6.Which law says that heavier objects require more force than lighter objects to move or accelerate?
- A.
1st
- B.
2nd
- C.
3rd
- 7.Which law explains how rockets are launched into space?
- A.
1st
- B.
2nd
- C.
3rd
- 8.Which law says for every action there is an equal but opposite reaction?
- A.
1st
- B.
2nd
- C.
3rd
- 9.An object with a mass of 10 kg has a force exerted on it of 200 N. What is it's acceleration? ______ m/s squared.
- 10.What is the force needed to accelerate a 200 kg object to 40 m/s squared? _____ N
- 11.The speed an object reaches when the force of gravity is balanced by the force of air resistance is called ____.
- A.
Acceleration
- B.
Terminal velocity
- C.
Velocity
- 12.You hit a wall with a stick. The equal but opposite is
- A.
The wall pushes against you
- B.
The wall pushes against the stick
- C.
You push against the stick
- D.
The stick pushes against you
- 13.The time for an action-reaction situation is
- A.
Instantaneous
- B.
At least 5 seconds
- 14.Which type of friction slows down an object that slides?
- A.
Sliding
- B.
Rolling
- C.
Static
- 15.The force of ___ exists between any two objects that have mass.
- A.
Acceleration
- B.
Gravity
- 16.The gravitational force of any object near Earth's surface ____
- A.
Is unknown
- B.
Depends on the objects mass
- C.
9.8 m/s squared
- 17.If a net force acts at an angle to the direction an object is moving, the object will follow a(n) ____ path.
- A.
Curved
- B.
Straight
- C.
Unknown
- D.
Straight downward
- 18.A force is a push or a pull
- A.
True
- B.
False
- 19.Rolling friction keeps an object at rest.
- A.
True
- B.
False
- 20.Momentum is an unbalanced force that stops almost everything.
- A.
True
- B.
False
- 21.A net force on an ovject changes the objects motion.
- A.
True
- B.
False
- 22.A force in the opposite direction to the motion of the object will cause the object to speed up.
- A.
True
- B.
False
- 23.If an object is at rest, all forces acting on that object must be balanced.
- A.
True
- B.
False
- 24.Static friction enables you to ride a bike without skidding and falling.
- A.
True
- B.
False
- 25.Applying the brakes uses sliding friction to slow the vehicle down.
- A.
True
- B.
False
- 26.Normal force is the rubbing force that acts against the motion between two touching surfaces.
- A.
True
- B.
False
- 27.If the forces acting on an object are unbalanced, the net force is not zero.
- A.
True
- B.
False
- 28.The tendency of an object to remain at rest is called inertia.
- A.
True
- B.
False
- 29.The density of an object that is 640 grams and 32cm3 is _____ g/cm3
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