Phys 205 Final Exam Questions With Verified Answers.
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Course
Phys 205
Institution
Phys 205
Phys 205 Final Exam Questions With
Verified Answers.
The scientist who rolled balls down a track and used his results to clarify the meaning of
accelerated motion was - answergalileo
standard unit of length in the metric system - answermeter
standard unit of force in the metric system - answer...
Phys 205 Final Exam Questions With
Verified Answers.
The scientist who rolled balls down a track and used his results to clarify the meaning of
accelerated motion was - answer✔galileo
standard unit of length in the metric system - answer✔meter
standard unit of force in the metric system - answer✔Newton
standard unit for mass in metric system - answer✔kilogram
which equation best describes distance vs time for both accelerated and non-accelerated straight
line motion? - answer✔d=vavg*t
a car travels 19 km in 5.q hours. what is the size of the average velocity in km/hr? - answer✔3.73
a person walks 15.2 m at an average velocity of 40 m/s. how long did it take? - answer✔0.38
delta x / delta t - answer✔velocity
delta v/delta t - answer✔acceleration
if an object is moving on a circle at a constant speed then Newton's Laws of motion say it must
be acted on by an outside force - answer✔true
In general to be accelerating an object has to be gaining linear speed - answer✔false
average speed if an object moving along a straight line is changing at a constant rate we can take
the final speed and the initial speed, add them together, and divide by two - answer✔true
formula needed to calculate average velocity from initial velocity and final velocity is -
answer✔vavg= (vf+vi)/2
if drop an object from rest, how fast is it moving 3 seconds later - answer✔-30
what is the average velocity of the object dropped after 3 seconds if it started from rest? -
answer✔-15
if you drop an object from rest near the surface of the earth and it falls freely, then the net
distance it would travel in 3 seconds is - answer✔-45
match newtons laws of motion - answer✔1: an obj in motion remains in motion
2: for every action there is an equal and opp reaction
3: the acceleration of an object is in the direction of the net force
the mass of an obj in kg is the same as an obj's weight - answer✔false
which of the following equations describes how weight is found near the surface of the earth? -
answer✔=mg
a runner sprinting from rest to 4.7 m/s in 1.2 sec has an average acceleration of - answer✔3.92
free body diagram - answer✔Ff: frictional force
Fn: normal force
Fgr: force due to gravity
Fp: pull on the box from the rope
Fp-Ffr: net force causing acceleration
newton's law of gravitation is closest to - answer✔attractive force between two masses is
proportional to the product of the masses divided by the square of their distances
the size of gravitational force btw 2 1kg masses 1m apart is closest to - answer✔6.67 X10^-11
a 2231 kg car moving at 11.6 m/s has a momentum closest to - answer✔25880
the product of a net force and time which changes the momentum of an object is called -
answer✔impulse
what is the size of the net force needed to stop a 93 kg mass moving at 13m/s in 7 sec? -
answer✔173
when 2 objs collide the forces between the 2 objs during the collision is - answer✔always the
same size, but in opposite directions
a 1 kg mass moving at 2 m/s left to right has momentum that is ___ the momentum of a 2 kg
mass moving at 1 m/s left to right. - answer✔the same size and direction as
a 1 kg mass moving at 2 m/s left to right has momentum that is ___ the momentum of a 2 kg
mass moving at 1 m/s right to left. - answer✔the same size but opposite in direction to
a baseball moving at 15m/s has ___ the momentum as a baseball moving at 30 m/s -
answer✔half
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