2D Motion Retake

Identify the following quantities as scalar or vector: the speed of a cheetah, the time it takes to run 6 miles southeast, dropping a ball off of the side of a building.

• vector, scalar, vector

• scalar, scalar, vector

• vector, scalar, scalar

• scaler, vector, vector

For the winter, a crow flies 21 m/s due south against a gust of wind with a velocity of 7 m/s. What is the resultant velocity of the crow?

• 22.13 m/s south

• 28 m/s south

• 14 m/s south

• 9.8 m/s south

Tags

NGSS.HS-PS2-1

Which of the following is the motion of objects moving in two dimensions under the influence of gravity?

• horizontal velocity

• direction

• parabola

• projectile motion

Tags

NGSS.HS-PS2-4

Which of the following is an example of projectile motion?

• dropping an egg on the floor.

• shooting an arrow at a target.

• kicking a soccer ball horizontally across the ground.

• riding a bike west for 3 miles.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

What is the shape of the path of a projectile?

• a wavy line

• a parabola

• a hyperbola

• projectiles do not follow a predictable path

Which of the following exhibits parabolic motion?

• Dak Prescott throwing a football 45 yards to a receiever

• a space shuttle orbiting earth

• an apple falling from a tree

• a hot wheel car moving along a flat track

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

A model rocket flies horizontally off the edge of a cliff at a velocity of 50 m/s. If the canyon below is 105 m deep, how far away from the edge of the cliff does the model rocket land?

• A 5250 m

• B 229.1 m

• C 72.5 m

• D 4.6 m

Tags

NGSS.HS-PS2-1

A passenger on a bus moving east sees a billboard for a Whataburger in 3 miles. From the passenger's perspective, the billboard appears to...

• stand still

• move west at a speed that is less than the bus's speed

• move west at a speed that is equal to the bus's speed

• move east at a speed that is equal to the bus's speed

The acceleration of gravity in the y-axis direction is closest to what value?

• -9.8 m/s²

• varied

• constant

• 0 m/s²

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Launching a projectile, what happens if you decrease the initial speed? Assume the object's mass and the angle of the launched object remain constant.

• the horizontal distance remains constant

• the horizontal distance is decreased

• the vertical distance doubles

• the horizontal distance increases