Semester 1 Physics Review

Semester 1 Physics Review
Differentiate between Speed and Velocity.
The difference between speed and velocity is that speed is just the rate of movement. VELOCITY
is SPEED an object moves AND the DIRECTION
Jose’s truck is stalled on a smooth flat road.
400 kg
If a force of 200 Newtons is used to push the truck along the road, at what rate of acceleration
will the truck move in m/sec2?
8000 m/sec2
2 m/sec2
0.5 m/sec2
5 m/sec2
f=ma so a=f/m
a= 0.5m/sec2
3. How do icebergs near the polar icecap demonstrate Newton’s Law of Inertia?
A. The iceberg will continue to move until it cracks from the pressure of the atmosphere.
B. The iceberg will continue to move until it melts into the ocean water from the heat of
the sun.
C. The iceberg will continue to move until it returns to its original location.
D. The iceberg will continue to move until it crashes into or slides against another iceberg.
An object in motion will remain in motion at a constant velocity until acted upon by an
outside force
The picture to the right shows sand dune in the desert, sand dunes
change over time. The changes in the sand dunes occurred as the
wind moves sand across the desert. Which type of energy is MOSTLY
responsible for moving the sand?
A. Kinetic energy – the energy of motion
B. Radiant energy
C. Potential energy
D. Chemical energy
5. Megan and Jaime made a straw-balloon rocket, shown in the diagram below.
They inflated the balloon, held the string tight and level, and watched the straw rocket move
forward. Use Newton’s 3rd Law (Action-Reaction) to explain why the rocket moves forward.
A. The string was too smooth
The action is the air rushing
B. The straw was taped to the top of the balloon
out of the balloon and the
C. The air rushing out of the balloon.
reaction is the balloon rocket
D. The air expanding the balloon’s volume
moving forward
6. Which of the following vector diagrams shows two forces that are balanced?
Describe how you know that the forces in the vector diagram you selected are balanced.
Both vector are the same size which indicates that the force is equal. They are applied in
opposite directions. The forces cancel each other out and they are equal to a sum force of zero.
Therefore the forces are balanced and the object will not move (or the motion will continue will
constant velocity)
Work = Force X Distance
Juan applies a force of 300 Newton’s to the first box for one minute, but the box did not
move. He applies the same amount of force to a second box and the box moves 6 meters.
What can you conclude about the work being done?
A. 1800 Joules of work was done on box 1 and 0 Joules of work was done on box 2.
B. 0 Joules of work was done on box 1 and 1800 Joules of work was done on box 2.
C. 50 Joules of work was done on box 1 and 200 Joules of work was done on box 2.
D. 0 Joules of work was done on box 1 and 100 Joules of work was done in box 2.
In order for work to be done the object must move –box 1 did not move therefore 0
amount of work was done. Box 2 moved w=fxd w=300 X 6 w=1800
The graph below shows a bikes distance along a road at any given time what was the
average speed of the bike?
0 km/hr
14 km/hr
2 km/hr
1 km/hr
Average distance for the entire trip is
taken from the final point on the
graph S = d/t S= 14/14 S = 1
Use the information on the graph below to answer #9.
9. The graph shows the distance a bird flies over its migration period. Match the following
statement with the section of the graph it describes.
_D_ The bird flew slowest during this time interval. The slope is the least steep
_B_ The bird stopped at a lake during this time interval. The line is flat horizontal
_A_ The bird flew the fastest during this time interval. The line has the greatest slope