Transcript Physics jeopardy

Physics review semester exam
• Name the major areas of physics
• Identify the area of physics that is most relevant to the following
• A) a high school football game
• B) lighting in a thunderstorm
• What are the activities involve in the scientific method ?
• Give to two examples of ways that physicists model the physical
world
• Which SI units would you use for the following measurements?
• A) the length of a swimming pool
• B) the time it takes a swimmer to swim a lap
• Express the following measurements as indicated
• A) 6.20 mg to kilogram
• B)88 km to meters
• Perform these calculations, following the rules for significant
figures
• A) 26x0.02584
• B)15.3 /1.1
• C)782.45-3.5328
• What area of physics deal with the subjects of heat and
temperature?
A) mechanics
• B)thermodynamics
• C)electrodynamics
• D)quantum mechanics
• What area of physics deal with the behavior of subatomic
particles?
• A) mechanics
• B)thermodynamics
• C)electrodynamics
• D)quantum mechanics
• What term describes a set of particles or interacting
components considered to be a distinct physical entity for the
purpose of study?
• A. System
• B. model
• C. hypothesis
• D. controlled experiment
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What is the SI base unit for length?
A. inch
B. foot
C. meter
D.kilometer
• A light-year is a unit of distance defined as the distance lights
travels in one year. Numerically, 1ly= 9500000000000 km.
How many meters in a light year?
• A. 9.5 𝑥1010
• B. 9.5 𝑥1012
• C. 9.5 𝑥1015
• D. 9.5 𝑥1018
• What is the definition of displacement?
• What is the definition of average velocity?
• What is the definition acceleration?
• What is the SI unit for average velocity and acceleration?
• A bus travels from El Paso, Texas to Chihuahua, Mexico, in 5.2 h
with an average velocity of 73 km/h to the south. What is the
bus’s displacement?
• A. 73 km to the south
• B. 370 km to the south
• C. 380 km to the south
• D.14 km/h to the south
• A ball initially at rest rolls down a hill and has an acceleration
of 3.3 𝑚/𝑠 2 . If it accelerates for 7.5 s, how far will it move
during this time?
• A. 12m
• B. 93m
• C. 120m
• D. 190m
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• A car moving eastward along a straight road increase its
speed uniformly from 16m/s to 32 m/s in 10 s.
• A. what is the car’s average acceleration?
• B. what is the car’s average velocity ?
• C. How far did it move while accelerating?
• Which of the following quantities are scalars,and which are
vectors?
• A. the acceleration of a plane
• B. the number of passengers on the plane
• C. the duration of the fight
• D. the displacement of the flight
• E. the amount of fuel required
• A rollercoaster moves 85 m horizontally, then travels 45m at an
angle of 30 degree above the horizontal. What is its
displacement from tis starting point?
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List an example of each of the following
A. a force causing an object to start moving
B. A force causing an object to stop moving
C. A force causing an object to its direction
• Give two examples of field force and two examples of contact
force
• What is the Si unit of force?
• A 6 kg object undergoes an acceleration of 2 𝑚/𝑠 2 .
• A) what is the magnitude of the net force acting on the object?
• A worker pushes a 1.5 𝑥103 N crate with a horizontal force of
345N a distance of 24m. Assume the coefficient of kinetic
friction between the crate and the floor is 0.220.
• A) How much work is done by the worker on the crate?
• B)How much work is done by the floor on the crate?
• C) what is the net work?
• A 0.075 kg ball in a kinetic sculpture moves at a constant speed
along a motorized vertical conveyor belt. The ball rises 1.32 m
above the ground.
• A constant frictional force of 0.350 N acts in the direction
opposite the conveyor’s belt. What is the net work done on the
ball?
• A pinball bangs against a bumper , given the ball a speed of
42 cm/s. If the ball has a mass of 50 g .What is the ball’s
kinetic energy in joules?
• A 50 kg student climbs up a 5 m rope at a constant speed . The
student has a power output of 20 w. How long does it take the
student to climb the rope? How much work does the student
does?
• A motor-driven winch pulls the 50 kg student from the previous
problem up the 5 m rope at a constant speed of 1.25 m/s. How
much power does the motor use in raising the student?
• What is work ?
• What is kinetic energy?
• A 0.42 kg soccer ball is moving downfield with a velocity of 12
m/s . A player kicks the ball so that it has a final velocity of 18
m/s downfield.
• A. What is the change in the ball’s momentum?
• High speed photographs show the head of a 215 g golf club
traveling at 55 m/s just before it strikes a 46 g golf ball at rest
on a tee. After the collision, the club travels at 42 m/s. Find
the speed of the golf ball just after impact.
• Give two examples of elastic collisions
• Give two examples of perfectly inelastic collisions
• A 95 kg. fullback moving south with a speed of 5 m /s has a
perfectly inelastic collision with a 90 kg opponent running north
at 3 m/s.
• A. Calculate the velocity of the players just after tackle.
• Two 0.40 kg soccer balls collide elastically in a head-on
collision. The first ball starts at rest, and the second ball has a
speed of 3.5 m/s. After the collision the second ball is at rest.
• A. What is the final speed of the first ball
• B. What is the kinetic energy of the first ball before the
collision?