PHYS 165 Module problem set 3
A 49.Five-kg toddler is playing on a Merry-Go-Round that has a diameter of 2.25 m. She is
shifting at a tangential speed of 5.32 msms. Calculate her centripetal pressure and her
centripetal acceleration. - ANS-Fc = mv2/r = (49.Five kg)(5.32 m/s2)/ (1.One hundred twenty
five m) = 25.2 m/s2
A ski teacher pushes a sixty eight.4-kg skier on waxed timber skis on wet snow. How a whole lot
acceleration does the skier experience if he pushes with a a hundred and fifty five-N horizontal
force? - ANS-N = W = mg = (68.Four kg)(nine.80 m/s2) = 670.32 N
(zero.10)(670.32 N)
(one hundred fifty five N) - (67.032 N) = 87.968 N
87.968 N/ sixty eight.Four kg = 1.29 m/s2
Be able to draw a loose frame diagram of a baseball participant sliding into second base. - ANS-
Be capable of draw a loose body diagram of a ebook resting on a desk. - ANS-
Be able to draw a loose frame diagram of a rocket in the course of liftoff. - ANS-
Calculate the spring consistent of a rubber band if it stretches 5.00 cm while a pressure of
three.55 N acts on it. - ANS-ok = FΔx= (3.55N)/ (zero.0500m)= 71.0Nm
Contact forces are an example of which type of essential force? - ANS-Electromagnetic
Differentiate between the 2 kinds of forces. - ANS-For contact forces, the agent and receiver of
the force should contact; for area forces, no contact is wanted
Differentiate between weight and mass. - ANS-The weight of an object is a measure of the pull
of gravity on that item, while the mass of an item is the degree of the quantity of material in an
item.
Dynamics - ANS-Branch of classical mechanics concerned with the have a look at of forces and
their consequences on motion
Force - ANS-Push or a pull
Give an instance of a contact force. - ANS-Baseball and baseball bat
Give an example of a subject force. - ANS-Gravity, electricity, and magnetism are all subject
forces
How lots pressure is wanted to start a 68.Four-kg skier on waxed wood skis on wet snow? -
ANS-N = W = mg = (68.Four kg)(nine.Eighty m/s2) = 670.32 N) = 93.8 N
If a 2696-kg automobile decelerates at 2.315 ms2ms2, what net force acts on it? - ANS-Fnet =
ma = (2696 kg) (-2.315 ms2ms2) = -6241 N
The unit for force, and what is its dating to the essential devices? - ANS-1N = 1kgms2
There are two types of forces. What are they? - ANS-Contact and Field
What are the four Fundamental Forces of Nature? - ANS-Gravitational, Electromagnetic, Strong
Nuclear Force, Weak Nuclear Force
What are the parts of a loose frame diagram? - ANS-You draw the item and all the forces
performing at the item
A 49.Five-kg toddler is playing on a Merry-Go-Round that has a diameter of 2.25 m. She is
shifting at a tangential speed of 5.32 msms. Calculate her centripetal pressure and her
centripetal acceleration. - ANS-Fc = mv2/r = (49.Five kg)(5.32 m/s2)/ (1.One hundred twenty
five m) = 25.2 m/s2
A ski teacher pushes a sixty eight.4-kg skier on waxed timber skis on wet snow. How a whole lot
acceleration does the skier experience if he pushes with a a hundred and fifty five-N horizontal
force? - ANS-N = W = mg = (68.Four kg)(nine.80 m/s2) = 670.32 N
(zero.10)(670.32 N)
(one hundred fifty five N) - (67.032 N) = 87.968 N
87.968 N/ sixty eight.Four kg = 1.29 m/s2
Be able to draw a loose frame diagram of a baseball participant sliding into second base. - ANS-
Be capable of draw a loose body diagram of a ebook resting on a desk. - ANS-
Be able to draw a loose frame diagram of a rocket in the course of liftoff. - ANS-
Calculate the spring consistent of a rubber band if it stretches 5.00 cm while a pressure of
three.55 N acts on it. - ANS-ok = FΔx= (3.55N)/ (zero.0500m)= 71.0Nm
Contact forces are an example of which type of essential force? - ANS-Electromagnetic
Differentiate between the 2 kinds of forces. - ANS-For contact forces, the agent and receiver of
the force should contact; for area forces, no contact is wanted
Differentiate between weight and mass. - ANS-The weight of an object is a measure of the pull
of gravity on that item, while the mass of an item is the degree of the quantity of material in an
item.
Dynamics - ANS-Branch of classical mechanics concerned with the have a look at of forces and
their consequences on motion
Force - ANS-Push or a pull
Give an instance of a contact force. - ANS-Baseball and baseball bat
Give an example of a subject force. - ANS-Gravity, electricity, and magnetism are all subject
forces
How lots pressure is wanted to start a 68.Four-kg skier on waxed wood skis on wet snow? -
ANS-N = W = mg = (68.Four kg)(nine.Eighty m/s2) = 670.32 N) = 93.8 N
If a 2696-kg automobile decelerates at 2.315 ms2ms2, what net force acts on it? - ANS-Fnet =
ma = (2696 kg) (-2.315 ms2ms2) = -6241 N
The unit for force, and what is its dating to the essential devices? - ANS-1N = 1kgms2
There are two types of forces. What are they? - ANS-Contact and Field
What are the four Fundamental Forces of Nature? - ANS-Gravitational, Electromagnetic, Strong
Nuclear Force, Weak Nuclear Force
What are the parts of a loose frame diagram? - ANS-You draw the item and all the forces
performing at the item
