PHYS 261 MIDTERM EXAM PREP PRACTICE
SOLUTION WELL COMPILED QUESTIONS
WITH VERIFIED ANSWERS GRADED A+
⩥ scalar.
Answer: a quantity that does not involve a direction
⩥ average speed formula.
Answer: total distance/ time
d/t
⩥ slope of velocity-versus-time graph.
Answer: acceleration
⩥ Newton's second law.
Answer:
⩥ Newton's third law.
Answer: for every action there is an equal but opposite reaction (action/
reaction pair)
⩥ newton.
,Answer: kg m/s^2
unit of force
⩥ inertia.
Answer: the property of objects to naturally resist changes in their states
of motion
⩥ weight (of an object).
Answer: the gravitational force exerted on it by the Earth or whatever
planet Fw or Fg= mg
⩥ normal force.
Answer: component of force that's perpendicular to the surface
⩥ free-body diagram.
Answer: A diagram that shows all the forces acting on an object
⩥ friction force.
Answer: the component of the contact force that's parallel to the surface
⩥ static friction.
Answer: occurs when there is no motion between two objects (friction
that holds an object still)
, ⩥ mu.
Answer: coefficient of friction
⩥ kinetic friction.
Answer: occurs when there is relative motion (when there's sliding)
⩥ kinetic energy.
Answer: the energy of an object due to motion
K= .5mv^2
⩥ potential energy.
Answer: the energy an object or system has by virtue of its position
Ug - gravitational potential energy
△Ug= mg△h
⩥ uniform circular motion.
Answer: -speed is constant
- velocity is not constant because the direction of velocity is always
changing
-in order to produce acceleration there must be a force towards the
center
SOLUTION WELL COMPILED QUESTIONS
WITH VERIFIED ANSWERS GRADED A+
⩥ scalar.
Answer: a quantity that does not involve a direction
⩥ average speed formula.
Answer: total distance/ time
d/t
⩥ slope of velocity-versus-time graph.
Answer: acceleration
⩥ Newton's second law.
Answer:
⩥ Newton's third law.
Answer: for every action there is an equal but opposite reaction (action/
reaction pair)
⩥ newton.
,Answer: kg m/s^2
unit of force
⩥ inertia.
Answer: the property of objects to naturally resist changes in their states
of motion
⩥ weight (of an object).
Answer: the gravitational force exerted on it by the Earth or whatever
planet Fw or Fg= mg
⩥ normal force.
Answer: component of force that's perpendicular to the surface
⩥ free-body diagram.
Answer: A diagram that shows all the forces acting on an object
⩥ friction force.
Answer: the component of the contact force that's parallel to the surface
⩥ static friction.
Answer: occurs when there is no motion between two objects (friction
that holds an object still)
, ⩥ mu.
Answer: coefficient of friction
⩥ kinetic friction.
Answer: occurs when there is relative motion (when there's sliding)
⩥ kinetic energy.
Answer: the energy of an object due to motion
K= .5mv^2
⩥ potential energy.
Answer: the energy an object or system has by virtue of its position
Ug - gravitational potential energy
△Ug= mg△h
⩥ uniform circular motion.
Answer: -speed is constant
- velocity is not constant because the direction of velocity is always
changing
-in order to produce acceleration there must be a force towards the
center
