WorksheetsGPHY202 Final Exam Review
Total questions: 30
Worksheet time: 23mins
Where does the pendulum have the least amount of potential energy?
A
B
C
D
E
If a 1300-kg car has been lifted so it has 19500 J of potential energy, it was lifted up ---.
1.5 m
150 m
15 m
0.67 m
A boy exerts an average force of 68N when he lifts a box 1.1m. How much work does he do?
74.8J
733.79J
61.82J
7.62J
Ahmad lifts a 50 kg hiking bag onto his sholuders through a vertical distance of 1.65 m in 3s. Calculate the power produced by Ahmad.
809.33W
269.78W
27.5W
82.5W
Which of the following illustration shows elastic potential energy?
When did an object have more kinetic energy?
When the time given on an object doubled
When the mass of an object doubled
When the mass of an object becomes half
Which one of these objects has the greater amount of momentum?
A turtle that slowly crosses a road
A parked car
A stop sign
A freight car of mass 20,000kg moves along a track at 15 m/s. What is the momentum of the car?
30,000 kg*m/s
3,000 kg*m/s
300,000 kg*m/s
3,000,000 kg*m/s
A 2kg object moving at 5 m/s encounters a 30 N resistive force over a duration of 0.10 seconds. The impulse experienced by this object is _____
0.30 N*s
2 N*s
2.5 N*s
3 N*s
7 N*s
In an elastic collision...
objects bounce off each other
objects stick together
objects stick together for a while then separate
one object flips over the other
In a completely inelastic collision...
objects bounce off each other
objects stick together
objects stick together for a while then separate
one object flips over the other
Trolley A has twice the mass of trolley B. In a head-on collision between trolley A and trolley B they both come to rest immediately after the collision. Which ONE of the following statements is TRUE?
Trolley A had twice the velocity of trolley B before the collision
The two trolleys had the same velocity before the collision.
Trolley B had twice the velocity of trolley A before the collision.
Trolley A experienced a greater change in momentum than trolley B.
The number of complete revolutions per second is:
frequency
period
torque
rotational inertia
Bonnie sits on the outer rim of a merry go round. Klyde site midway between the center and the rim. The ride makes one revolumtion every two seconds.
Klyde's angular velocity is
the same as Bonnie's
twice Bonnie's
half of Bonnie's
1/4 Bonnie's
A dancer on ice spins faster when she folds here arms. This is due to
Increases in energy and increase in angular momentum
Decrease in friction at the skates
Constant angular momentum and increase in kinetic energy
Increase in energy an decreases in angular momentum
if the same torque is applied on a hoop (I=MR2) and a solid disk (I=1/2MR2), after 5s which object will be moving faster?
Hoop
Solid Disk
Which diagram best shows the gravitational interaction between Earth and a satellite?
Heat is transferred from _____ objects to ______ objects
big,small
cold,hot
hot,cold
As part of a lab experiment, Tasha drops a metal cube into a beaker of water, as shown in the figure below.
After energy in the form of heat transfers between the substances, what is the final temperature of the water?
The final temperature is 25 °C because there is more water than metal.
The final temperature is 50 °C because the metal warms the water to the temperature of the metal.
The final temperature is between 25 °C and 50 °C because energy is transferred from the metal to the water.
The final temperature is between 25 °C and 50 °C because most of the thermal energy is lost to the air around the substances.
The water in Mario’s swimming pool absorbs energy as heat during the day. Which of the following would the water in the pool be most likely to do?
condense
evaporate
freeze
melt
Emerson places a beaker of water on a hotplate and turns the hotplate on. The temperature in the room is 25 ºC. After the water heats to 75 ºC, she adds pieces of ice to the beaker.
Which of the following describes a transfer of heat energy that occurs during this experiment?
from the air to the water
from the ice to the beaker
from the water to the ice
from the water to the hotplate
Which description defines heat?
total thermal energy of an object or substance
change in the temperature of a substance in degrees Celsius
energy transferred between objects at different temperatures
average kinetic energy of the particles that make up a substance
The pan is made of iron. The handle is NOT too hot to touch. What might the pan's handle be made of?
copper
aluminum
wood
iron
A temperature scale that is used mostly in United States.
According to it, water freezes at 32 degrees and boils at 212 degrees.
Celsius
Fahrenheit
Kelvin
All of them
