SNEAD STATE PHYSICS 1 FINAL
EXAM
A cross-country skier is skiing along at a zippy 8.0 m/s. She stops pushing and simply
glides along, slowing to a reduced speed of 6.0 m/s after gliding for 5.0m. What is the
magnitude of her acceleration as she slows? - CORRECT ANSWER-a= -2.8 m/sec^2
Excellent human jumpers can leap straight up to a height of 110 cm off the ground. To
reach this height, with what speed would a person need to leave the ground? -
CORRECT ANSWER-4.64 m/s
A pipe discharges storm water into a creek. Water flows horizontally out of the pipe at
1.5 m/s, and the end of the pipe is 2.5 m above the creek. How far out from the end of
the pipe is the point where the stream of the water meets the creek? - CORRECT
ANSWER-1.07 m
The Scion iQ is a compact car that is capable of very tight turns- it can spin around in a
circle 8.0 m in diameter. If a driver goes around such a circle at 5 m/s (a bit faster than
10 mph), what is the magnitude of his acceleration? - CORRECT ANSWER-6.25 m/s^2
In a head-on collision, an infant is much safer in a child safety seat when the seat is
installed facing the rear of the car. Explain. - CORRECT ANSWER-His head and back
rests against the padded back of the seat. In the case of the head-on collision, the child
with seat will continue to move forward at the before-crash speed until he hits
something. The back of the seat hits some object, but the front of the seat supports the
entire back and head of the child. As a result, the force acting on the child increases a
maximum value over a time interval. This time interval is considerably better than
instantaneous. Due to support of the seat to the head of the child, there will be no whip-
lash.
It takes Harry 35 s to walk from x= -12m to x=-47m. What is his velocity? - CORRECT
ANSWER-v= -1 m/s
A city has streets laid out in a square grid, with each block 135 m long. If you drive north
for three blocks, then west for two blocks, how far are you from your starting point? -
CORRECT ANSWER-d= 486.75 m
In a major league baseball, the pitcher's mound is 60 feet from the batter. If a pitcher
throws a 95 mph fastball, how much time elapses from when the ball leaves the
pitcher's hand until the ball reaches the batter? - CORRECT ANSWER-0.43 s
EXAM
A cross-country skier is skiing along at a zippy 8.0 m/s. She stops pushing and simply
glides along, slowing to a reduced speed of 6.0 m/s after gliding for 5.0m. What is the
magnitude of her acceleration as she slows? - CORRECT ANSWER-a= -2.8 m/sec^2
Excellent human jumpers can leap straight up to a height of 110 cm off the ground. To
reach this height, with what speed would a person need to leave the ground? -
CORRECT ANSWER-4.64 m/s
A pipe discharges storm water into a creek. Water flows horizontally out of the pipe at
1.5 m/s, and the end of the pipe is 2.5 m above the creek. How far out from the end of
the pipe is the point where the stream of the water meets the creek? - CORRECT
ANSWER-1.07 m
The Scion iQ is a compact car that is capable of very tight turns- it can spin around in a
circle 8.0 m in diameter. If a driver goes around such a circle at 5 m/s (a bit faster than
10 mph), what is the magnitude of his acceleration? - CORRECT ANSWER-6.25 m/s^2
In a head-on collision, an infant is much safer in a child safety seat when the seat is
installed facing the rear of the car. Explain. - CORRECT ANSWER-His head and back
rests against the padded back of the seat. In the case of the head-on collision, the child
with seat will continue to move forward at the before-crash speed until he hits
something. The back of the seat hits some object, but the front of the seat supports the
entire back and head of the child. As a result, the force acting on the child increases a
maximum value over a time interval. This time interval is considerably better than
instantaneous. Due to support of the seat to the head of the child, there will be no whip-
lash.
It takes Harry 35 s to walk from x= -12m to x=-47m. What is his velocity? - CORRECT
ANSWER-v= -1 m/s
A city has streets laid out in a square grid, with each block 135 m long. If you drive north
for three blocks, then west for two blocks, how far are you from your starting point? -
CORRECT ANSWER-d= 486.75 m
In a major league baseball, the pitcher's mound is 60 feet from the batter. If a pitcher
throws a 95 mph fastball, how much time elapses from when the ball leaves the
pitcher's hand until the ball reaches the batter? - CORRECT ANSWER-0.43 s
