6. A 725 gram toy car is racing around a track which has a radius of 85 cm at a
ID: 2095377 • Letter: 6
Question
6. A 725 gram toy car is racing around a track which has a radius of 85 cm at a speed of 32 cm/s.
What is the centripetal force acting on the car?
a. 0.27 N
b. 1.3 N
c. 0.087 N
d. 87 N
7. A 1500 kg car is going around a corner of an icy road at a speed of 5.0 m/s. Assume the car's path
traces a circle with a radius of 8.0 m. The car has a centripetal acceleration of 3.125 m/s2. What is the
minimum coefficient of friction required for the car to stay on the road?
a. 0.23
b. 0.32
c. 0.58
d. 0.85
8. A 150 gram gumball is allowed to roll off of a 95 cm tall table with an initial horizontal speed of 1.2
m/s. How long does it take for the ball to reach the floor once it begins to fall?
a. 0.44 seconds
b. 0.19 seconds
c. 1.3 seconds
d. 2.1 seconds
9. Which of the following statements about gravity is most correct about any object on Earth?
a. Gravitational acceleration and gravitational force are not constant.
b. Gravitational acceleration and gravitational force are constant.
c. Gravitational acceleration is not constant and gravitational force is constant.
d. Gravitational acceleration is constant and gravitational force is not constant.
10. A couple (Lady and Guy) decide to end their date on a Ferris Wheel so they can view the London
skyline. Soon both people find themselves uncomfortable and decide to pass the time by analyzing the
physics of the Ferris Wheel they are currently on. Unfortunately the couple begin to argue about who
has the best understanding of the Ferris Wheel. Who is correct?
Lady: The centripetal acceleration and centripetal force are directed toward the center of the
wheel while the velocity is parallel to the centripetal acceleration.
Guy: The centripetal acceleration is directed toward the center of the wheel while the
centripetal force is directed away from the center of the wheel. Th velocity is perpendicular to
the centripetal acceleration.
a. Both are correct
b. Neither one is correct
c. Lady is correct
d. Guy is correct
Explanation / Answer
6. A 725 gram toy car is racing around a track which has a radius of 85 cm at a speed of 32 cm/s.
What is the centripetal force acting on the car?
a. 0.27 N
b. 1.3 N
c. 0.087 N
d. 87 N
ANSWER: C
7. A 1500 kg car is going around a corner of an icy road at a speed of 5.0 m/s. Assume the car's path
traces a circle with a radius of 8.0 m. The car has a centripetal acceleration of 3.125 m/s2. What is the
minimum coefficient of friction required for the car to stay on the road?
a. 0.23
b. 0.32
c. 0.58
d. 0.85
ANSWER: B
8. A 150 gram gumball is allowed to roll off of a 95 cm tall table with an initial horizontal speed of 1.2
m/s. How long does it take for the ball to reach the floor once it begins to fall?
a. 0.44 seconds
b. 0.19 seconds
c. 1.3 seconds
d. 2.1 seconds
ANSWER: C
9. Which of the following statements about gravity is most correct about any object on Earth?
a. Gravitational acceleration and gravitational force are not constant.
b. Gravitational acceleration and gravitational force are constant.
c. Gravitational acceleration is not constant and gravitational force is constant.
d. Gravitational acceleration is constant and gravitational force is not constant.
ANSWER: D
10. A couple (Lady and Guy) decide to end their date on a Ferris Wheel so they can view the London
skyline. Soon both people find themselves uncomfortable and decide to pass the time by analyzing the
physics of the Ferris Wheel they are currently on. Unfortunately the couple begin to argue about who
has the best understanding of the Ferris Wheel. Who is correct?
Lady: The centripetal acceleration and centripetal force are directed toward the center of the
wheel while the velocity is parallel to the centripetal acceleration.
Guy: The centripetal acceleration is directed toward the center of the wheel while the
centripetal force is directed away from the center of the wheel. Th velocity is perpendicular to
the centripetal acceleration.
a. Both are correct
b. Neither one is correct
c. Lady is correct
d. Guy is correct
ANSWER: D
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