uniform circular motion problems
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Uniform Circular Motion
PROBLEMS
The maximum force a road can exert on the tires of a 1600-kg car is 8400 N. What is the maximum velocity at which the car can round a turn of radius 130 m?#1
PROBLEM
GIVEN:
m=1600kg
Ff/Fc=8400 N
R=130 m
39.24 m/s
26.12 m/s
42.66 m/s
(a) (b) (c)
The maximum force a road can exert on the tires of a 1600-kg car is 8400 N. What is the maximum velocity at which the car can round a turn of radius 130 m?
39.24 m/sYOUR ANSWER:
WRONG!PROBLEM
#2
26.12 m/sYOUR ANSWER:
CORRECT!PROBLEM
#2
42.66 m/sYOUR ANSWER:
WRONG!PROBLEM
#2
PROBLEM:
#2
A 1000 kg car rounds a turn of radius 25 m at a velocity of 8 m/s.How much Centripetal Force is needed? Where does this force come from?
GIVEN:
w=1000kg
r=25m
V=8 m/s
2560 N; TENSIO
N
2650 N; FRICTIO
N
2560 N; FRICTIO
N
(a) (b) (c)
A 1000 kg car rounds a turn of radius 25 m at a velocity of 8 m/s.
How much Centripetal Force is needed? Where does this force come from?
2560 N TENSIONYOUR ANSWER:
WRONG!PROBLEM
#3
2560 N FRICTIONYOUR ANSWER:
CORRECT!PROBLEM
#3
2650 N FRICTION YOUR ANSWER:
WRONG!PROBLEM
#3
PROBLEM
#3
A 453,000 g car rounds a curve of 122 m radius at a speed of 48 km/hr. How large must be the force of friction b/w the tires and the pavement to prevent the car from skidding?
GIVEN:
m=453000 g
r=122 m
V=48km/h
8555 N
660 N 480 N
(a) (b) (c)
A 453,000 g car rounds a curve of 122 m radius at a speed of 48 km/hr. How large must be the force of friction b/w the tires and the pavement to prevent the car from skidding?
8555 NYOUR ANSWER:
WRONG!PROBLEM
#4
660 NYOUR ANSWER:
CORRECT!PROBLEM
#4
480 NYOUR ANSWER:
WRONG!PROBLEM#
4
PROBLEM
#4
As the velocity of an object in UCM is doubled and its radius is halved; the centripetal force is ____________________.
Increased four times
doubled
Multiplied 8 times
(a) (b) (c)
As the velocity of an object in UCM is doubled and its radius is halved; the centripetal force is ____________________.
Increased four timesYOUR ANSWER:
WRONG!PROBLEM#
5
Multiplied eight timesYOUR ANSWER:
CORRECT!PROBLEM#
5
doubledYOUR ANSWER:
WRONG!PROBLEM#
5
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