Projectile Motion 222

In the formula vy = ayt, what is the value of ay for an object in projectile motion? -9.8 m/s2 0 m/s2 m/s2 1.0 m/s2

-9.8 m/s2

A baseball is launched horizontally from a height of 1.8 m. The baseball travels 0.5 m before hitting the ground. How fast is the baseball moving horizontally, rounded to the nearest hundredth?

0.82 m/s

Which formula can be used to calculate the horizontal displacement of a horizontally launched projectile? x = vi(cos ) x = vi(sin )t x = ayt x = vxt

trianglex= Vxtrianglet

Which arrow best represents the path of an object with projectile motion?

B

Rosa uses the formula (vi cos)t to do a calculation. Which value is Rosa most likely trying to find? the vertical acceleration of a projectile launched at an angle the vertical acceleration of a projectile launched horizontally the horizontal displacement of a projectile launched at an angle the horizontal displacement of a projectile launched horizontally

the horizontal displacement of a projectile launched at an angle

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? 0.5 m/s 0.87 m/s 12.5 m/s 21.7 m/s

21.7 m/s

A projectile is launched horizontally from a height of 8.0 m. The projectile travels 6.5 m before hitting the ground. The velocity of the projectile the moment it was launched, rounded to the nearest hundredth, is

5.09 m/s

Ingrid kicks a football with an initial velocity of 12 m/s at an angle of 45° relative to the ground. The horizontal component of the initial velocity to the nearest tenth is m/s.

8.5 m/s

Barry is conducting an experiment and rolls a tennis ball down a ramp. Which best describes the motion of the tennis ball? It does not exhibit projectile motion and follows a straight path down the ramp. It does not exhibit projectile motion and follows a parabolic path down the ramp. It exhibits projectile motion and follows a straight path down the ramp. It exhibits projectile motion and follows a parabolic path down the ramp.

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

Why is a baseball thrown by a pitcher considered to have projectile motion? It gains a lot of kinetic energy. It has horizontal and vertical motion. It gets pulled to the ground by gravity. It moves in a diagonal direction.

It has horizontal and vertical motion.

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? The marble's horizontal and vertical velocities change. The marble's horizontal and vertical velocities remain the same. The marble's vertical velocity changes, but its horizontal velocity does not. The marble's horizontal velocity changes, but its vertical velocity does not.

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

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? The paper airplane's motion is due to horizontal inertia and the vertical pull of gravity. A force other than gravity is acting on the paper airplane. The paper airplane's motion can be described using only one dimension. A push and a pull are the primary forces acting on the paper airplane.

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

A basketball rolls off a deck that is 3.2 m from the pavement. The basketball lands 0.75 m from the edge of the deck. How fast was the basketball rolling? Seema lists the given values in a chart and determines that the unknown value is vx. Which describes Seema's error? The y and x values are switched. The unknown is , not vx. The value for ay is not known. The value of y should be -3.2 m.

The value of triangley should be -3.2 m.

Quinn launches two projectiles, X and Y, at two different speeds. Which best compares the motion of the projectiles? The horizontal velocity of projectile X is changing, and the vertical velocity of projectile Y is constant. The vertical velocity of projectile Y is changing, and the horizontal velocity of projectile X is constant. The horizontal acceleration of projectile X is -9.8 m/s2, and the vertical acceleration of projectile Y is 0 m/s2. The horizontal acceleration of projectile Y is -9.8 m/s2, and the vertical acceleration of projectile Y is 0 m/s2.

The vertical velocity of projectile Y is changing, and the horizontal velocity of projectile X is constant.

Mohammed made a chart to list examples and nonexamples of projectile motion. Which best completes the chart? a football thrown in the air a kite flying on a string a golf ball rolling off a table water spraying from a fountain

a kite flying on a string

The formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of which function(s)? tangent only cosine only sine and tangent cosine and sine

cosine and sine

Projectile motion is a combination of which two types of motion? parabolic and curved straight and diagonal horizontal and vertical constant and linear

horizontal and vertical