Straighterline Introduction to Physics (lab) PHY250L Lab 3 Newton’s Laws COMPLETE
Worksheet (New Version August 2024) Scored 100%
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Lab Report Format Expectations
Utilize college level grammar and formatting when answering text based questions.
Report all equations in a proper mathematical format, with the correct signs and symbols.
Submissions with incomplete or improperly formatted responses may be rejected.
Pre-Lab Questions
1. State Newton’s Laws in words.
An object will stay in motion until acted upon by an external force. The acceleration of an
object is directly related to the net force and inversely related to its mass. Every action ( force)
has an equal and opposite reaction
2. Consider the masses in Figure 4 to the
right. Draw a Free Body Diagram for:
,Lab 3 Newton’s Laws PHY250L
a. Mass 1
, Lab 3 Newton’s Laws PHY250L
b. and Mass 2.
Figure 4: Free Body Diagram: 2 objects with mass
hanging on a pulley by string.
3. Apply Newton’s 2nd Law, F=ma, to write the force equations for M 1 and M2. This will yield
two equations that detail the sum of forces in your free body diagram. You should get two
force equations that describe the Tension in the string (force in the up direction), weight for
each mass (force in the down direction) and accelerations for each mass (a 1 and a2).
F1=m1a1--> m1a1=m1g-Tension
F2=m2a2--> m2a2=m2g-Tension
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