vectors
draw the following vector: <4, -7>
answer should have a vector with an x component of 4 and y component of -7
What is the difference between distance and displacement?
Displacement measures the straight-line distance from start to finish, and it has magnitude and direction, whereas distance is a scalar representing the total path traveled, so it only has magnitude.
Draw the free body diagram for an object in free-fall.
If a block has a weight of 15N and is at rest, what is the magnitude of the normal force on the block.
15N
What period is Mrs. Barnett's prep period this year?
6
find the angle of the vector 3i + 4j from the positive x-axis in degrees
53.13 degrees
A cyclist rides 60 meters in the negative direction down a straight path in 10 seconds. What is the average velocity of the cyclist?
-6 m/s
Draw the free body diagram for an object at rest on a surface.
forces to include: gravity & normal
Two strings hold a ball in place. The string on the left is longer than the string on the right. Which string applies a stronger tension force on the ball?
the string on the right
How many clubs is Mrs. Barnett an advisor for?
3
what is the y component of a vector with an angle of 60 degrees from the positive x-axis and an x-component of 4
4 sqrt(3)
Find the position function of a particle with an an acceleration of 5 m/s^2, initial velocity of -9 m/s and an initial position of -2.4 m
x(t)=2.5t^2-9t-2.4
Draw the free body diagram for an object on a flat surface being pushed to the right at a constant rate.
forces to include: gravity, normal, push
A block with a weight of 20N is being pulled by a rope with a force of 12 N, and the block is still at rest. What is the magnitude of the all the other forces on the block.
friction: 12N
gravity: 20N
normal force: 20N
What did Mrs. Barnett change about her appearance over the summer?
She got a haircut.
A plane travels at a rate of 60 mph due North. The wind blows against the plane at a constant rate of 20 mph due East. Find the actual velocity of the plane. Ignore fluid dynamics.
63.245º N of E
A particle is shot from 50 m above the ground at a velocity of 20 m/s towards the right. How far does it travel in the x direction?
Draw a free body diagram for both components of an Atwood's machine.
response must include tension and gravity on both objects
What is the magnitude of the tension on two equal length strings holding up a block if the weight of the block is 20 N and the angle between the block and the string is 25 degrees.
23.662 N
How long has Mrs. Barnett taught at Amador? (include years and months)
21 yrs, 2 months
A boat is traveling across a river. The boat can travel at a rate of 5 m/s and the water travels North at a rate of 2m/s. If the river is 10 m wide and the boat starts on the west bank, what angle does the boat need to travel at so that it reaches the other end of the river directly east of its starting position?
23.578º S of E
A man is sitting on a tree 5 m above the ground. A horse with a height of 2 m is 50 m away from him is traveling towards him at a rate of 20 m/s. At what time should the man jump off of the tree to land on the horse on time? Ignore air resistance.
1.952 s
draw a free body diagram for the following scenario: a block is dragged up a hill with a slope of 30º at a constant rate.
forces to include: tension, gravity, normal, friction
A block is held up by two strings, one has a tension force of 5N, and the other string has a tension force of 8N. The weight of the block is 5N. What is the angle between the two strings.
131.79º
What sport does Mrs. Barnett's daughter play.
softball