PHYS 101 COMPREHENSIVE REVIEW 2026
VERIFIED QUESTIONS AND SOLUTIONS
◉Your apparent weight is equal to your weight... . Answer: In an
elevator not accelerating
◉A bathroom scale reads . Answer: Your apparent weight
◉The coefficient of restitution for a particular ball is 0.7. If the ball
rebounds from surface traveling at 60 m/s its collision speed was. .
Answer: 85.7 m/s²
◉When a baseball player hits a ball, the bat can respond by... .
Answer: Rebounding, vibrating, rotating
◉A bat moving at 90 km/h strikes an oncoming ball moving at 110
km/h. If the batter follows through so that the speed of the bat
doesn't change during the hit and the coefficient of restitution of the
ball is 0.6, what speed does the batted ball have after it has been
struck. . Answer: 210 km/h
◉A ball hits a wall going 10 m/s, and bounces off going 7 m/s. The
coefficient of restitution is: . Answer: 0.70
,◉Why do elastic balls bounce so well? . Answer: They store energy
through compression, like a spring.
◉A popular playground toy is flexible seat that has automobile
springs attached to it for a little bounce. When a 200 N child sits on
the toy, it compresses 5 mm downward. What is the ride's spring
constant? . Answer: 40000 N/m
◉You are watching a semi truck bounce up and down on a spring.
(Yep it's a toy!) At the topmost point in the truck's path, . Answer:
The truck velocity is zero but its acceleration is downward.
◉Why do balls that defame bounce poorly? . Answer: They dissipate
energy in an unrecoverable form
◉Imagine that you are able to go on a fishing trip that you have
always wanted to. Your friend gets a bite that exerts a force of about
50N on the pole and it bends by a certain amount. Now you have a
pole identical to your friends and you get a hit that bends the pole
about twice as much. You can estimate that the force on your pole is
about: . Answer: 100 N
◉A sprinter runs North in a straight line and covers a distance of
100m in 12 seconds. Is the magnitude of her average velocity equal
, to her average speed? . Answer: Yes, because of moving in single
direction
◉You drive at a constant speed of 20 miles/hour around a city block,
changing out the neighborhood. Are you accelerating? . Answer: Yes,
even if you change direction going a constant speed you accelerate.
◉As you turn your car suddenly to the left, loose objects on the
dashboard start sliding to the right. Are these objects accelerating to
the right? . Answer: No
(the car is moving, object isn't really changing direction. Same
speed/direction I am accelerating. Part of inertia.)
◉Suppose I throw a ball upward into the air. After the ball leaves my
hand, is there any force pushing the ball upward? Neglect any effects
due to air. . Answer: No
(going up because of inertia, if no contact there is no force.)
◉If we could eliminate air resistance, would a list sheet of paper and
a heavy book fall at the same rate? . Answer: Yes
VERIFIED QUESTIONS AND SOLUTIONS
◉Your apparent weight is equal to your weight... . Answer: In an
elevator not accelerating
◉A bathroom scale reads . Answer: Your apparent weight
◉The coefficient of restitution for a particular ball is 0.7. If the ball
rebounds from surface traveling at 60 m/s its collision speed was. .
Answer: 85.7 m/s²
◉When a baseball player hits a ball, the bat can respond by... .
Answer: Rebounding, vibrating, rotating
◉A bat moving at 90 km/h strikes an oncoming ball moving at 110
km/h. If the batter follows through so that the speed of the bat
doesn't change during the hit and the coefficient of restitution of the
ball is 0.6, what speed does the batted ball have after it has been
struck. . Answer: 210 km/h
◉A ball hits a wall going 10 m/s, and bounces off going 7 m/s. The
coefficient of restitution is: . Answer: 0.70
,◉Why do elastic balls bounce so well? . Answer: They store energy
through compression, like a spring.
◉A popular playground toy is flexible seat that has automobile
springs attached to it for a little bounce. When a 200 N child sits on
the toy, it compresses 5 mm downward. What is the ride's spring
constant? . Answer: 40000 N/m
◉You are watching a semi truck bounce up and down on a spring.
(Yep it's a toy!) At the topmost point in the truck's path, . Answer:
The truck velocity is zero but its acceleration is downward.
◉Why do balls that defame bounce poorly? . Answer: They dissipate
energy in an unrecoverable form
◉Imagine that you are able to go on a fishing trip that you have
always wanted to. Your friend gets a bite that exerts a force of about
50N on the pole and it bends by a certain amount. Now you have a
pole identical to your friends and you get a hit that bends the pole
about twice as much. You can estimate that the force on your pole is
about: . Answer: 100 N
◉A sprinter runs North in a straight line and covers a distance of
100m in 12 seconds. Is the magnitude of her average velocity equal
, to her average speed? . Answer: Yes, because of moving in single
direction
◉You drive at a constant speed of 20 miles/hour around a city block,
changing out the neighborhood. Are you accelerating? . Answer: Yes,
even if you change direction going a constant speed you accelerate.
◉As you turn your car suddenly to the left, loose objects on the
dashboard start sliding to the right. Are these objects accelerating to
the right? . Answer: No
(the car is moving, object isn't really changing direction. Same
speed/direction I am accelerating. Part of inertia.)
◉Suppose I throw a ball upward into the air. After the ball leaves my
hand, is there any force pushing the ball upward? Neglect any effects
due to air. . Answer: No
(going up because of inertia, if no contact there is no force.)
◉If we could eliminate air resistance, would a list sheet of paper and
a heavy book fall at the same rate? . Answer: Yes
