# Physics Final Review: part 1 Name ____________________________________________ Date ________________ Chapters 7, 12, 16, 18, 19, 20 Impulse:

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Physics Final Review: part 1

Name ____________________________________________ Date ________________

Chapters 7, 12, 16, 18, 19, 20

Impulse:

Momentum:

Internal forces:

External forces:

Conservation of linear momentum:

Elastic collision:

Inelastic

collision:

Center of mass:

Linear thermal expansion:

Thermal stress:

Bimetallic strip:

Volume thermal expansion:

Heat:

Specific Heat Capacity:

Calorimeter:

Latent heat:

Humidity:

Periodic waves:

Amplitude:

Wavelength:

Period:

Frequency:

Longitudinal wave:

Transverse wave:

Power:

Decibel:

Doppler effect:

Electric charge:

Coulomb:

Electrostatic force:

Conductor:

Insulator:

Charging by contact:

Charging by induction:

Coulomb’s law:

Electric field:

Test charge:

Parallel plate
capacitor:

Electric potential:

Equipotential surface:

Capacitor:

Dielectric:

Capacitance:

Dielectric:

Electromotive force:

Direct current:

Alternating current:

Ohm’s Law:

Resistance:

Resistivity:

Temperature coefficient of resistivity:

Electric power:

CHAPTER 7: IMPULSE AND MOMENTUM

1.

A freight train is being assembled in a switching yard. Car 1 has a mass of m1
= 65 x 10^3kg and moves at a velocity of vo1 = +0.80m/s. Car 2, with a mass
of m2 = 92 x 10^3kg and a velocity of vo2 = +1.3m/s, overtakes car 1 and
couples to it. Neglecting

friction, find the common velocity vf of the cars after
they become coupled.

Pg. 203

2.

-
on collision between two balls. One ball has a mass
of m1 = 0.250kg and an initial velocity of +5.00m/s. The other has a mass of

m2 = 0.800kg and is initially at rest. No external forces act on the balls. What
are the velocities of the balls after the collision?

Pg. 206

3.

A ballistic pendulum can be used to measure the speed of a projectile, such as
a bullet. The
ballistic pendulum consists of a stationary 2.50kg block of wood
suspended by a wire of negligible mass. A 0.0100kg bullet is fired into the
block, and the block (with the bullet in it) swings to a maximum height of
0.650 m above the initial position. Fi
nd the speed with which the bullet is
fired, assuming that air resistance is negligible.

Pg. 208

4.

A toy that is initially at rest consists of three parts that are held together by
spring
-
loaded clips. At a given instant, the toy “explodes.”

Two of the pieces,
which each have a mass of 25.0g, travel with velocities of 7.0cm/s to the
south and 7.0cm/s to the west, respectively. The third piece has a velocity of
3.3cm/s at an angle of 45 degrees north of east. What is the mass of the third
pi
ece?

5.

A concrete sidewalk is constructed between two buildings on a day when the
temperature is 25 C. The sidewalk consists of two slabs, each three meters in
length and of negligible thickness. As the temperature rises to 38 C, the
slabs
expand, but no space is provided for thermal expansion. The buildings do
not move, so the slabs buckle upward. Determine the vertical distance y that
the concrete raises.

Pg. 365

6.

A steel beam is used in the roadbed of a bridge. The beam is mounted
between two concrete supports when the temperature is 23 C, with no room
provided for thermal expansion. What compressional stress must the
concrete supports apply to each end of the be
am, if they are to keep the beam
from expanding when the temperature rises to 42 C? Assume that the
distance between the concrete supports does not change as the temperature
rises.

Pg. 366

7.

A 7.00kg glass bowl [c = 840J/kgxC] contains 16.0
kg of punch at 25.0 C. Two
-
and
-
a
-
half kilograms of ice [c = 2.00x10^3J/kgxC] are added to the punch.
The ice has an initial temperature of
-
20.0 C, having been kept in a very cold
freezer. The punch may be treated as if it were water [c = 4186J/kgxC], a
nd
it may be assumed that there is no heat flow between the punch bowl and the
external environment. The latent heat of fusion for water is 3.35 x 10^5J/kg.
When thermal equilibrium is reached, all the ice has melted, and the final
temperature of the mix
ture is above 0 C. Determine this temperature.

Pg. 379