Kinematics
A constant force acting on a body experiencing no change in its environment will give the body
W) constant acceleration
X) constant speed
Y) constant velocity
Z) zero acceleration
W (Constant Acceleration)
What is the BEST term for the tendency of any mass at rest to remain at rest?
inertia, newton's 1st law
Which of the following are the units of entropy?
W) Joules X) Newtons per kelvin Y) Watts Z) Joules per kelvin
Z) Joules per Kelvin
Which of the following correctly describes a magnifying glass?
W) Single convex lens
X) Two convex lenses
Y) Single concave lens
Z) Two concave lenses
W) Single convex lens
Who came up with the 3 laws of motion?
Newton
Identify all of the following three statements that are true of a skydiver as they approach terminal velocity: 1) Their speed is increasing; 2) Their acceleration magnitude is increasing; 3) The magnitude of the gravitational force on them is decreasing.
1
If a constant force is applied to an object, which of the following quantities must also be constant?
W) Position
X) Acceleration
Y) Velocity
Z) Speed
X) Acceleration
What type of energy is generally thought of as the energy of movement?
Kinetic Energy
What physical property of neutrinos, which was confirmed in the past decade, contradicts earlier assumptions that neutrinos travel at the speed of light?
Identify all of the following three quantities that, according to the Einstein field equations, affect the curvature of spacetime in a given place and time: 1) Energy density; 2) Momentum density; 3) Mass density
All
Identify all of the following three statements that are true for a projectile launched horizontally from a cliff (neglecting air resistance):
The horizontal component of its velocity remains constant.
The vertical component of its acceleration increases over time.
The path of the projectile is parabolic.
1 & 3
Identify all of the following three objects that can be affected by gravity: 1) A human; 2) A planet; 3) A ray of light.
All of them
What is the most common term in physics for the product of mass times velocity?
momentum
What property of a sound wave is most commonly associated with loudness?
Amplitude (A)
J.J. Thomson won the Nobel Prize in Physics for calculating the charge-to-mass ratio of what particles in cathode rays?
electrons
Identify all of the following three statements that are true for an object executing uniform circular motion:
Its speed is constant, but its velocity is continuously changing.
Its acceleration vector is always perpendicular to its velocity vector.
If the radius of the circular path is doubled while maintaining the same constant speed, the magnitude of its centripetal acceleration doubles.
1 & 2
Identify all of the following three statements that are true according to Newton’s Third Law when a heavy truck collides head-on with a light compact car:
The magnitude of the force exerted by the truck on the car is greater than the magnitude of the force exerted by the car on the truck.
The car experiences a greater magnitude of acceleration during the impact than the truck.
The forces exerted on each vehicle form an action-reaction pair.
2 & 3
Which of the following is an example of an action that demonstrates negative work? W) Lifting a book X) Holding a book Y) Throwing a book to the ground Z) Gently lowering a book to the ground
Z) Gently lowering a book to the ground
Which of the 4 basic forces of the universe is most directly related to the ability of various metals to be hammered and formed into various shapes?
Identify all of the following three statements that are true regarding Galileo Galilei's contributions to mechanics:
He demonstrated that objects of different masses fall with the same acceleration in a vacuum.
He formulated the mathematical expression for the universal law of gravitation ($F = G \frac{m_1 m_2}{r^2}$).
He conceptualized the idea of inertia before Newton formalized it into his First Law.
1 & 3
Identify all of the following three statements that are true regarding the motion of an object whose position-time graph $x(t)$ is concave down over a time interval:
The object's velocity is negative throughout that time interval.
The object's acceleration is negative throughout that time interval.
The object's speed must be decreasing throughout that time interval.
2
Identify all of the following three statements that are true for a block sliding down a ramp with constant velocity:
The magnitude of the kinetic friction force equals the component of gravity parallel to the ramp.
The net force acting on the block is zero.
The normal force on the block is equal to the total weight of the block.
1 & 2
Electricity used to power a home in the United States is sold by what unit? W) Kilojoule X) Kilojoule per hour Y) Kilowatt
Z) Kilowatt hour
Identify all of the following three properties of an electromagnetic wave that can change when the wave passes from one medium to another: 1) Period; 2) Wavelength; 3) Speed.
2+3
Identify all of the following three statements that are true regarding Johannes Kepler's laws of planetary motion:
Planets move in circular orbits around the Sun.
A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
Planets move faster when they are closer to the Sun.
2 & 3