1. A motorcyclist is coasting with the engine off at a steady speed 17 m/s but enters a sandy stretch where the coefficient of friction is .80. Will the cyclist emerge from the sandy stretch without having to start the engine if the sand lasts for 15 m. If so, what will be the speed upon emerging?

2. One car has twice the mass of a second car, but only half as much kinetic energy. When both cars increased their speed by 5.0 m/s, they have the same kinetic energy. What were the original speeds of the two cars?

3. A ball is attached to a horizontal cord of length L whose other end is fixed. If the ball is released, what will be its speed at the lowest point of its path? A peg is located a distance h directly below the point of attachment of the cord. If h=0.8L, what will be the velocity of the ball when it reaches the top of its circular path about the peg?

4. A ring, a disk, and a sphere of equal masses and radius start rolling down the hill. Which of these three objects will reach the bottom of the hill first?

5. A block slides a distance d down a frictionless plane and then comes to a stop after sliding a distance s across a rough horizontal plane. What fraction of the distance s does the block slide before its speed is reduced to one - third of the maximum speed it had at the bottom of the ramp?

6. A uniform rod of mass m and length L can pivot freely (without friction) about a hinge attached to a wall. The rod is held horizontally and then released. Determine the linear velocity of the tip of the rod when it touches the wall.

In an industrial cooling process, water is circulated through a system. If the water is pumped with a speed of 0.45 m/s under a pressure of 400 torr from the first floor through a 6.0-cm diameter pipe, what will be the pressure on the next floor 4.0 m above in a pipe with a diameter of 2.0 cm?

A man with a mass of 65 kg skis down a friction-less hill that is 4.4m high. At the bottom of the hill the terrain levels out. As the man reaches the horizontal section, he grabs a 19-kgbackpack and skis off a 1.0 m-high ledge. At what horizontal distance from the edge of the ledge does the man land?

A 4.0 kg toboggan rests on a frictionless icy surface, and a 2.0 kg block rests
on top of the toboggan. The coefficient of static friction µs between the block
and the surface of the toboggan is 0.58, whereas the kinetic friction
16.T op
coefficient is 0.48. The block is pulled by a horizontal force of 30 N as shown.
a. Ca

An open channel having a rectangular cross section is laid so that the rate of grade is 0.00048. The width of the channel is 10.00 ft, and the value of n in Kutter's formula may be taken as 0.011. When the depth of the water in the channel is 4.00 ft, the velocity computed by the Chezy formula is?

A 4.0 kg toy race car can move along an x axis. The figure below gives Fx of the force acting on the car, which begins at rest at time t = 0. (The vertical axis is marked in increments of 2 N.)
See the attached document for the necessary graph.
(a) What is the momentum of the car at t = 6.0 s
(b) What is the moment

The photon is normally assumed to have zero rest mass. If the photon had a small mass, this would alter the potential energy which the electron experiences in the electric field of the proton. Instead of
V(r) = -(e^2)/(4(pi)(epsion_0)(r))
we would have
V(r) = -((e^(2))(e^(-r/r_0)))/(4(pi)(epsilon_0)(r))
where r_0 is

A major-league pitcher can throw a baseball in excess of 41.0 m/s. Assume the pitcher throws the ball horizontally to a catcher who is 17.0 m away.
a) Sketch a y vs. x graph.
b) How long does it take for the ball to reach the catcher?
c) How far does the ball drop by the time it reaches the catcher?

The FlyRight Aircraft Maintenance (FRAM) division of the FlyRight Company (FRC) performs all maintenance for FRC's aircraft. Produce a data model segment that reflects the following business rules:
All mechanics are FRC employees. Not all employees are mechanics. Some mechanics are specialized in engine (EN) maintenance. Some