PHYSICS 131 FINAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW
A skydiver's terminal velocity will be greatest if she falls
a) lying flat on her stomach.
b) lying flat on her back.
c) with her parachute open.
d) head first. Ans✓✓✓ d
Padded dashboards in cars are safer in an accident than non-padded ones
because passengers hitting the dashboard encounter
a. shorter time of contact
b. lengthened time of contact
c. decreased impulse
d. increased momentum Ans✓✓✓ b
Two identical objects in outer space, one moving at 2 m/s, the other at 1
m/s, have a head-on collision and stick together. Their combined speed
after the collision is
a. 1 m/s
b. 0.67 m/s
c. 0.33 m/s
d. none of the above Ans✓✓✓ d
,What is the acceleration of a car that starts from rest and 5 seconds later
reaches a speed of 20 m/s?
a. 1 m/s
b. 2 m/s
c. 3 m/s
d. 4 m/s
e. 5 m/s Ans✓✓✓ d
A block pulled to the left with 15 N and to the right with 5 n at the same
time experiences a net force of
a. 5 N
b. 20 N
c. 15 N
d. 10 N Ans✓✓✓ d
Joshua is attracted to earth by a 500 N gravitational force. The Earth is
attracted toward Joshua with a force of
a. 0
b. 250 N
c. 500 N
d. 1000 N Ans✓✓✓ c
,The chef at the infamous Fattening Tower of Pizza tosses a spinning
disk of uncooked pizza dough into the air. The disk becomes wider
during its flight, while its rotational speed
a. slows
b. quickens
c. remains constant Ans✓✓✓ a
The average braking force of a 1000 kg car moving at 10 m/s braking to
a stop in 5 s is
a. 3000 N
b. 1000 N
c. 5000 N
d. 2000 N
e. 4000 N Ans✓✓✓ d
the distance a freely falling bowling ball falls each second
a. is about 10 m
b. is about 5 m
c. increases
d. none of the above Ans✓✓✓ c
A ring and a disk both at rest roll down a hill together. Which
accelerates slower?
a. both roll at the same speed
, b. ring
c. depends on the masses
d. disk
e. need more information Ans✓✓✓ b
A coconut and a bird's feather fall from a tree through the air to the
ground below. The force of air resistance is
a. the same on each
b. greater on the coconut
c. greater on the feather Ans✓✓✓ b
Horses with the greatest linear speed on a merry go round are located
a. near the outside
b. anywhere, because they all move at the same speed
c. near the center Ans✓✓✓ a
Toss a baseball bat into the air and it wobbles about its
a. geometrical center
b. heavier end
c. center of mass Ans✓✓✓ c
A ball rolling down an incline has its maximum potential energy at
a. the top
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW
A skydiver's terminal velocity will be greatest if she falls
a) lying flat on her stomach.
b) lying flat on her back.
c) with her parachute open.
d) head first. Ans✓✓✓ d
Padded dashboards in cars are safer in an accident than non-padded ones
because passengers hitting the dashboard encounter
a. shorter time of contact
b. lengthened time of contact
c. decreased impulse
d. increased momentum Ans✓✓✓ b
Two identical objects in outer space, one moving at 2 m/s, the other at 1
m/s, have a head-on collision and stick together. Their combined speed
after the collision is
a. 1 m/s
b. 0.67 m/s
c. 0.33 m/s
d. none of the above Ans✓✓✓ d
,What is the acceleration of a car that starts from rest and 5 seconds later
reaches a speed of 20 m/s?
a. 1 m/s
b. 2 m/s
c. 3 m/s
d. 4 m/s
e. 5 m/s Ans✓✓✓ d
A block pulled to the left with 15 N and to the right with 5 n at the same
time experiences a net force of
a. 5 N
b. 20 N
c. 15 N
d. 10 N Ans✓✓✓ d
Joshua is attracted to earth by a 500 N gravitational force. The Earth is
attracted toward Joshua with a force of
a. 0
b. 250 N
c. 500 N
d. 1000 N Ans✓✓✓ c
,The chef at the infamous Fattening Tower of Pizza tosses a spinning
disk of uncooked pizza dough into the air. The disk becomes wider
during its flight, while its rotational speed
a. slows
b. quickens
c. remains constant Ans✓✓✓ a
The average braking force of a 1000 kg car moving at 10 m/s braking to
a stop in 5 s is
a. 3000 N
b. 1000 N
c. 5000 N
d. 2000 N
e. 4000 N Ans✓✓✓ d
the distance a freely falling bowling ball falls each second
a. is about 10 m
b. is about 5 m
c. increases
d. none of the above Ans✓✓✓ c
A ring and a disk both at rest roll down a hill together. Which
accelerates slower?
a. both roll at the same speed
, b. ring
c. depends on the masses
d. disk
e. need more information Ans✓✓✓ b
A coconut and a bird's feather fall from a tree through the air to the
ground below. The force of air resistance is
a. the same on each
b. greater on the coconut
c. greater on the feather Ans✓✓✓ b
Horses with the greatest linear speed on a merry go round are located
a. near the outside
b. anywhere, because they all move at the same speed
c. near the center Ans✓✓✓ a
Toss a baseball bat into the air and it wobbles about its
a. geometrical center
b. heavier end
c. center of mass Ans✓✓✓ c
A ball rolling down an incline has its maximum potential energy at
a. the top
