random other Physics

Vector Y has greater magnitude than vector X

Two vectors are shown. Which statement best compares the vectors?

23 N

A ball that has a mass of 0.25 kg spins in a circle at the end of a 1.6 m rope. The ball moves at a tangential speed of 12.2 m/s. What is the centripetal force acting on the ball?

23 kg

A child on a spinning playground ride is 0.36 m from the center of the ride. The centripetal force on the child is 19 N. What is the mass of the child if the child has a tangential speed of 0.54 m/s?

a ball twirled on a string that just broke

An object is represented by the dot on the motion map. Which object is most likely represented by the motion map?

Zero Acceleration

An object moving at a constant velocity will always have a

The paper airplane's motion is due to horizontal inertia and the vertical pull of gravity.

Charlotte throws a paper airplane into the air, and it lands on the ground. Which best explains why this is an example of projectile motion?

-9.8 m/s2

In the formula vy = ayt, what is the value of ay for an object in projectile motion?

gravity

Johanna makes the table below to organize her notes about centripetal forces. Which type of force should she place in the cell marked X?

6,100 N

Julius competes in the hammer throw event. The hammer has a mass of 7.26 kg and is 1.215 m long. What is the centripetal force on the hammer when it has a tangential speed of 31.95 m/s? The answer is rounded off to the nearest whole number.

kite flying on a string

Mohammed made a chart to list examples and nonexamples of projectile motion. Which best completes the chart?

horizontal and vertical

Projectile motion is a combination of which two types of motion?

the horizontal displacement of a projectile launched at an angle

Rosa uses the formula (vi cos)t to do a calculation. Which value is Rosa most likely trying to find?

acceleration

Study the motion map shown. Some of the vectors have been circled. What do the circled vectors represent?

72 cm

Study the vector diagram. What is the magnitude of vector X?

24 m

Study the velocity vs. time graph shown. What is the displacement of the object from 2 seconds to 6 seconds?

The object is not accelerating.

The chart shows data for a moving object. Which conclusion is best supported by the information in the chart?

C

The diagram shows components that have been added together to form Rx and Ry. Rx and Ry are the components of the resultant vector. Which formula can be used to find the angle of the resultant vector?

216 m

A truck heading east has an initial velocity of 6 m/s. It accelerates at 2 m/s2 for 12 seconds. What distance does the truck travel in the given time?

4 m/s2

A velocity vs. time graph is shown. What is the acceleration of the object?

change in acceleration or direction

For motion maps that illustrate accelerated motion, what does a new level indicate?

R2 = A2 + B2

Which equation represents the Pythagorean theorem, which can be used to find the magnitude of resultant vectors?

24 km/h south

A position-time graph is shown for a motorcycle driving south. According to the graph, what is the motorcycle's average velocity?

94

A runner moves west with an initial velocity of 4 m/s. She accelerates 3 m/s2 for 30 seconds. The runner's final velocity is

1.3 m/s

A wrecking ball has a mass of 650 kg. It swings from a cable that is 21 m long. The centripetal force on the ball is 56 N. What is the tangential speed of the wrecking ball?

interia

As a truck rounds a curve, a box in the bed of the truck slides to the side farthest from the center of the curve. This movement of the box is a result of

It does not exhibit projectile motion and follows a straight path down the ramp.

Barry is conducting an experiment and rolls a tennis ball down a ramp. Which best describes the motion of the tennis ball?

21.7 m/s

Lexy throws a dart with an initial velocity of 25 m/s at an angle of 60° relative to the ground. What is the approximate vertical component of the initial velocity?

The marble's horizontal velocity changes, but its vertical velocity does not.

Sung rolls a marble off the edge of a table. She rolls the marble off the same table again but at a different speed. Which best describes the projectile motion of the marble as it leaves the table at the two different speeds?

B2 = R2 - A2

Suppose two initial vectors intersect at a right angle and form a resultant vector. The magnitudes of one initial vector, A, and the resultant vector, R, are given. Which formula can be used to find the magnitude of the other initial vector, B?

36.9°

The diagram shows vectors that are not perpendicular to one another. What is the angle of the resultant vector, rounded to the nearest tenth?

C

Which formula is used to find an object's acceleration?

Acceleration vectors point toward the center of the circle. Velocity vectors are the same length.

In a uniform circular motion map, what is always true? Check all that apply.

slope

The __________ of a position-time graph represents an object's velocity.

10

The diagram shows three different bicycle routes taken by Frank, Alexis, and Juan to get to the electronics store. According to the diagram, Juan traveled _____ kilometers.

Vectors Px and Py are components of vector P.

The diagram shows three vectors. Which best describes a relationship among the vectors?

It acts perpendicular to the velocity and is directed toward the center of the circle.

What must be true of a force that causes an object to move in a circular motion?

A dog runs an average of 8 mph

Which is an example of speed?