KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Law of Reaction (Newton's 3rd Law)
Answer:
Material bodies push back when pushed. Whenever
one material body exerts a force on another material body through contact or
adhesion, the
second body exerts a force of equal magnitude and opposite direction on the first
body.
Q: Collision
Answer:
The duration of contact between two or more bodies. Depends on elasticity - the
higher the elasticity, the lesser the duration of contact. Duration of contact is equal
for both
bodies. Force (contact and reaction) is equal for both bodies, just in opposite
directions. When
two or more material bodies are in contact (collide), they can accelerate or deform.
,KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Impulse (J)
Answer:
Applied force * duration of force. The change in momentum during a collision.
Equal in opposite directions.
J = F * t.
Units: N*s.
Q: Conservation of Momentum in Collisions
Answer:
For each body involved in a collision, its change in
momentum (∆L) is equal to the impulse applied (J) to it. Both bodies will have the
same change
in momentum, but the change in velocity can be different.
Since the impulse applied to each body is equal in magnitude and opposite in
direction, their
changes in momentum are equal in magnitude and opposite in direction.
J = ∆L.
,KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Friction
Answer:
Resistance to motion that dissipates energy - it is transformed into another form.
Can be external and internal.
Q: External Friction
Answer:
Occurs between objects in contact. Can be sliding, rolling, or fluid drag.
Q: Sliding Friction
Answer:
Applies to objects sliding over one another.
Q: Rolling Resistance
Answer:
Applies to wheels rolling over a surface.
, KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Fluid Drag
Answer:
Applies to objects moving through fluids.
Q: Internal Friction (Viscosity)
Answer:
Occurs during deformation.
Q: Angular Kinetics
Answer:
The big difference is that inertia is no longer mass - instead, we use
moment of inertia. How forces cause acceleration is also quite different. Quantities
and laws
are very similar to those of linear kinetics.
Latest 2026 Update
Q: Law of Reaction (Newton's 3rd Law)
Answer:
Material bodies push back when pushed. Whenever
one material body exerts a force on another material body through contact or
adhesion, the
second body exerts a force of equal magnitude and opposite direction on the first
body.
Q: Collision
Answer:
The duration of contact between two or more bodies. Depends on elasticity - the
higher the elasticity, the lesser the duration of contact. Duration of contact is equal
for both
bodies. Force (contact and reaction) is equal for both bodies, just in opposite
directions. When
two or more material bodies are in contact (collide), they can accelerate or deform.
,KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Impulse (J)
Answer:
Applied force * duration of force. The change in momentum during a collision.
Equal in opposite directions.
J = F * t.
Units: N*s.
Q: Conservation of Momentum in Collisions
Answer:
For each body involved in a collision, its change in
momentum (∆L) is equal to the impulse applied (J) to it. Both bodies will have the
same change
in momentum, but the change in velocity can be different.
Since the impulse applied to each body is equal in magnitude and opposite in
direction, their
changes in momentum are equal in magnitude and opposite in direction.
J = ∆L.
,KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Friction
Answer:
Resistance to motion that dissipates energy - it is transformed into another form.
Can be external and internal.
Q: External Friction
Answer:
Occurs between objects in contact. Can be sliding, rolling, or fluid drag.
Q: Sliding Friction
Answer:
Applies to objects sliding over one another.
Q: Rolling Resistance
Answer:
Applies to wheels rolling over a surface.
, KPE160: Module 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Fluid Drag
Answer:
Applies to objects moving through fluids.
Q: Internal Friction (Viscosity)
Answer:
Occurs during deformation.
Q: Angular Kinetics
Answer:
The big difference is that inertia is no longer mass - instead, we use
moment of inertia. How forces cause acceleration is also quite different. Quantities
and laws
are very similar to those of linear kinetics.
