Phys 165 Module 3 Exam
A 38.4-kg infant is playing on a Merry-Go-Round that has a diameter of 3.Forty two m. She is
moving at a uniform tangential velocity of 3.32 ms. Answer the following questions about the
child's motion.
A. Calculate the centripetal acceleration of the child.
B. Which equation is the first-rate preference to calculate the centripetal acceleration of the
child?
Fc=mv2r
ac=v2r
Fnet=ma
W = mg
c. Calculate the centripetal force performing on the child.
D. What equation is the great preference to calculate the centripetal pressure acting on the kid?
Fc=mv2r
ac=v2r
Fnet=ma
W = mg - ANS-a) ac=v^2/r solution in m/s^2
b) 2
c) Fc=mv^2/r Answer in N
d) both 2 or three
A manufacturing unit employee is pushing horizontally on a a hundred twenty five kg timber
create which is sitting at relaxation on a wooden horizontal ground. The coefficient of static
friction between the crate and the floor is zero.500 and the coefficient of kinetic friction between
the crate and the floor is zero.300. Answer the following questions about this situation.
A. What is the weight of the crate?
B. What equation could be used to discover the load of the crate?
No equation is wanted, the load is given.
W = mg
F = ma
Fs max=μsN
c. What is the most static friction pressure which can act at the crate?
D. Which equation can be used to find the most static friction force?
Fkmax=μkN
Fsmax=μsN
F = ma
, W = mg
e. What is the kinetic friction pressure that could act at the crate?
F. Which equation could be used to locate the kinetic friction force performing at the crate?
Fk=μkN
Fs=μsN
F = ma
W = mg
g. When the factory employee pushes with 495 N what is the net - ANS-a) W=mg Answer in N
b) 2
c) FsMax=mewsN Answer in N
d) 2
e) Fk=mewkN solution in N
f) 1
g) zero
h) four
i) four
j) Fnet=Fa=Fk solution in N
ok) three
l) 3
According to Newton's Third Law of Motion, what's the reaction to a ball being kicked with the
aid of a teen? - ANS-The ball applies a pressure to the youngster's foot
Calculate the acceleration due to gravity at the surface of Saturn, for the reason that its mass is
5.68 x 1026 kg and its common radius is 5.85 x 107 m. - ANS-Use g=Gm/d^2 Answer in m/s^2
Calculate the spring consistent of a spring if it stretches 17.Five cm whilst a force of 102 N acts
on it. - ANS-use ok=f/x
Answer in N/m
Draw a Free Body Diagram of a car coasting to the right across a stage avenue and slowing
down. Then solution the subsequent questions about your free body diagram:
a. How many forces are in your Free Body Diagram?1. 1 2. 2 three. 3 four. 4
b. How does the magnitude of the automobile's weight compare to the significance of the
ordinary pressure acting on the automobile? 1. The weight of the car is bigger than the normal
force appearing on the auto 2. The everyday force performing on the auto is greater than the
load of the automobile 3. The magnitudes of those forces are the same four. There isn't always
sufficient information to examine the magnitudes of those forces
c. How does the significance of the net force acting on the car evaluate to the importance of the
frictional pressure implemented onto the auto? 1. The net force appearing on the car is larger
than the frictional pressure acting on the car. 2. The frictional pressure acting on the car is larger
than the internet force performing on the automobile 3. The - ANS-a) three
b) three
c) three
A 38.4-kg infant is playing on a Merry-Go-Round that has a diameter of 3.Forty two m. She is
moving at a uniform tangential velocity of 3.32 ms. Answer the following questions about the
child's motion.
A. Calculate the centripetal acceleration of the child.
B. Which equation is the first-rate preference to calculate the centripetal acceleration of the
child?
Fc=mv2r
ac=v2r
Fnet=ma
W = mg
c. Calculate the centripetal force performing on the child.
D. What equation is the great preference to calculate the centripetal pressure acting on the kid?
Fc=mv2r
ac=v2r
Fnet=ma
W = mg - ANS-a) ac=v^2/r solution in m/s^2
b) 2
c) Fc=mv^2/r Answer in N
d) both 2 or three
A manufacturing unit employee is pushing horizontally on a a hundred twenty five kg timber
create which is sitting at relaxation on a wooden horizontal ground. The coefficient of static
friction between the crate and the floor is zero.500 and the coefficient of kinetic friction between
the crate and the floor is zero.300. Answer the following questions about this situation.
A. What is the weight of the crate?
B. What equation could be used to discover the load of the crate?
No equation is wanted, the load is given.
W = mg
F = ma
Fs max=μsN
c. What is the most static friction pressure which can act at the crate?
D. Which equation can be used to find the most static friction force?
Fkmax=μkN
Fsmax=μsN
F = ma
, W = mg
e. What is the kinetic friction pressure that could act at the crate?
F. Which equation could be used to locate the kinetic friction force performing at the crate?
Fk=μkN
Fs=μsN
F = ma
W = mg
g. When the factory employee pushes with 495 N what is the net - ANS-a) W=mg Answer in N
b) 2
c) FsMax=mewsN Answer in N
d) 2
e) Fk=mewkN solution in N
f) 1
g) zero
h) four
i) four
j) Fnet=Fa=Fk solution in N
ok) three
l) 3
According to Newton's Third Law of Motion, what's the reaction to a ball being kicked with the
aid of a teen? - ANS-The ball applies a pressure to the youngster's foot
Calculate the acceleration due to gravity at the surface of Saturn, for the reason that its mass is
5.68 x 1026 kg and its common radius is 5.85 x 107 m. - ANS-Use g=Gm/d^2 Answer in m/s^2
Calculate the spring consistent of a spring if it stretches 17.Five cm whilst a force of 102 N acts
on it. - ANS-use ok=f/x
Answer in N/m
Draw a Free Body Diagram of a car coasting to the right across a stage avenue and slowing
down. Then solution the subsequent questions about your free body diagram:
a. How many forces are in your Free Body Diagram?1. 1 2. 2 three. 3 four. 4
b. How does the magnitude of the automobile's weight compare to the significance of the
ordinary pressure acting on the automobile? 1. The weight of the car is bigger than the normal
force appearing on the auto 2. The everyday force performing on the auto is greater than the
load of the automobile 3. The magnitudes of those forces are the same four. There isn't always
sufficient information to examine the magnitudes of those forces
c. How does the significance of the net force acting on the car evaluate to the importance of the
frictional pressure implemented onto the auto? 1. The net force appearing on the car is larger
than the frictional pressure acting on the car. 2. The frictional pressure acting on the car is larger
than the internet force performing on the automobile 3. The - ANS-a) three
b) three
c) three
