7 . Write two expressions for impulse. What are the units of impulse?
8 . In what kind of collision is momentum conserved? In what kind of collision is kinetic energy
conserved?
9 . What is the mass of a block with weight W ?10 . A ball is thrown straight up. At the peak of its flight, what is the ball’s acceleration? Be sure to give
both magnitude and direction.
11 . A mass experiences a force vector with components 30 N to the right, 40 N down. Explain how to
determine the magnitude and direction (angle) of the force vector.
12 . Write the definition of the coefficient of friction, μ . What are the units of m ?
13 . How do you find acceleration from a velocity-time graph?
14 . How do you find displacement from a velocity-time graph?
15 . How do you find velocity from a position-time graph?
16 . An object has a positive acceleration. Explain briefly how to determine whether the object is
speeding up, slowing down, or moving with constant speed.
17 . Given the velocity of an object, how do you tell which direction that object is moving?
18 . When is the gravitational force on an object mg ? When is the gravitational force Gm 1 m 2 /r 2 ?
19 . What is the direction of the net force on an object that moves in a circle at constant speed?
20 . Under what conditions is the equation at^2 valid? Give a specific situation in which
this equation might seem to be valid, but is NOT.Electricity and Magnetism Quiz
1 . Given the charge of a particle and the electric field experienced by that particle, give the equation to
determine the electric force acting on the particle.
2 . Given the charge of a particle and the magnetic field experienced by that particle, give the equation to
determine the magnetic force acting on the particle.
3 . What are the units of magnetic flux? What are the units of EMF?
4 . A wire carries a current to the left, as shown below. What is the direction and magnitude of the
magnetic field produced by the wire at point P ?5 . When is the equation kQ/r 2 valid? What is this an equation for?
6 . The electric field at point P is 100 N/C; the field at point Q , 1 meter away from point P , is 200 N/C.
A point charge of +1 C is placed at point P . What is the magnitude of the electric force experienced
by this charge?
7 . Can a current be induced in a wire if the flux through the wire is zero? Explain.