Unit Test
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- Words: 349
- Pages: 4
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________
Unit Test – Newton’s Laws & Forces 1) If an object remains at rest, there must be no force acting on it. Is this statement correct? Explain. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 2) The tendency of an object to maintain its state of motion is called: a) Newton’s first law b) Galileo’s principle c) Inertia 3) If the net force on an object is zero, the object MUST: a) be at rest
b) be in motion with a constant velocity
c) have zero acceleration
4) An object weights 300 N on Earth and 50 N on the Moon. Does the object also have less inertia on the Moon? Explain. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________ 5) If a tablecloth is yanked out very quickly, the dishes on top of it will barely move. Why? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 6) A 3.0-newton net force is applied to a 1.5-kilogram mass. What is its acceleration?
7) What is the mass of a person weighing 740 N?
8) The engine of a 1.0-kilogram toy plane exerts a 15-newton forward force on the plane. If the air exerts an 8.0-newton resistive force on the plane, what is the magnitude of the acceleration of the plane?
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________ 9) Three block are pulled along a frictionless surface by a horizontal force as shown a
below. T1 m1
T1
T2 m2
T2
F = 18.0 N m3
a) What is the acceleration of the system?
b) What are the tension forces in the light stringes (T1 & T2)? [Hint: Can T1 = T2? Investigate by drawing free-body diagrams of each block separately.]
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________ 10) A hockey player hits a puck with her stick, giving the puck an initial speed of 5.0 (m/s). If the puck slows uniformly and comes to rest in a distance of 20 m, what is the coefficient of kinetic friction between the ice and the puck?
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________
Unit Test – Newton’s Laws & Forces 1) If an object remains at rest, there must be no force acting on it. Is this statement correct? Explain. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 2) The tendency of an object to maintain its state of motion is called: a) Newton’s first law b) Galileo’s principle c) Inertia 3) If the net force on an object is zero, the object MUST: a) be at rest
b) be in motion with a constant velocity
c) have zero acceleration
4) An object weights 300 N on Earth and 50 N on the Moon. Does the object also have less inertia on the Moon? Explain. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________ 5) If a tablecloth is yanked out very quickly, the dishes on top of it will barely move. Why? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 6) A 3.0-newton net force is applied to a 1.5-kilogram mass. What is its acceleration?
7) What is the mass of a person weighing 740 N?
8) The engine of a 1.0-kilogram toy plane exerts a 15-newton forward force on the plane. If the air exerts an 8.0-newton resistive force on the plane, what is the magnitude of the acceleration of the plane?
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________ 9) Three block are pulled along a frictionless surface by a horizontal force as shown a
below. T1 m1
T1
T2 m2
T2
F = 18.0 N m3
a) What is the acceleration of the system?
b) What are the tension forces in the light stringes (T1 & T2)? [Hint: Can T1 = T2? Investigate by drawing free-body diagrams of each block separately.]
Name:
Date:________________________________
Period:
Score:_______________________________
Newton’s Law: Unit Test – Mr. Kenahan_______________________________________ 10) A hockey player hits a puck with her stick, giving the puck an initial speed of 5.0 (m/s). If the puck slows uniformly and comes to rest in a distance of 20 m, what is the coefficient of kinetic friction between the ice and the puck?
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